All Words Glossary Glossary of Chemistry Terms beginning with letter A Browse the Chemistry Glossary A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AB noun A blood type of the ABO system that has a both blood antigens and may receive all blood types, and donate to AB. abbreviation Alberta (Canadian province). able-bodied seaman. also. antiballistic. Bachelor of Arts. abiological adjective Pertaining to inanimate things. ABS initialism Anti-lock braking system absorb verb (transitive) To include so that it no longer has separate existence; to swallow up; to engulf; to overwhelm; to cause to disappear as if by swallowing up; to use up; to incorporate; to assimilate. Dark oblivion soon absorbs them all. - Cowper The large cities the wealth and fashion. - W. Irving (transitive) To suck up; to drink in; to imbibe; as a sponge or as the lacteals of the body. - Bacon (transitive) To learn (transitive) To engross or engage wholly; to occupy fully; as, absorbed in study or in the pursuit of wealth. (transitive) To consume completely. (transitive) To endure. (transitive) (physics) To take up by chemical or physical action. Heat, light, and electricity are absorbed in the substances into which they pass. (transitive) (finance) To assume or pay for as part of a commercial transaction. absorption noun The act or process of absorbing or sucking in anything, or of being absorbed and made to disappear; as, the absorption of bodies in a whirlpool, the absorption of a smaller tribe into a larger. (context, chemistry, physics) An imbibing or reception by molecular or chemical action; as, the absorption of light, heat, electricity, etc. (physiology) In living organisms, the process by which the materials of growth and nutrition are absorbed and conveyed to the tissues and organs. Entire engrossment or occupation of the mind; as, absorption in some employment. AC initialism (electrical) alternating current, Alternating Current (electrical): often used to indicate an alternating potential rather than a current, as in 110V AC. Air Conditioning, usually: A/C as charged, as in: guilty as charged, usually: a/c Area Code all clear, as in button on electronic calculator (internet slang) audible chuckle (set theory) axiom of choice accelerant noun a substance that accelerates the development of a fire; especially some petroleum product used to spread an act of arson accelerator nounOften used adjectivally One who, or that which, accelerates. A device for causing acceleration. A substance which speeds up chemical reactions. accelerator pedal. acceptor noun One who accepts. (context, In law and commerce) one who accepts a draft or a bill of exchange; a drawee after he has accepted. (chemistry) an atom or molecule which can accept an electron to form a chemical bond. (physics) a chemical acceptor atom forming a positive hole in a semiconductor. acetal noun (organic chemistry) Any diether of a geminal diol, R2C(OR')2 (where R' does not = H). acetaldehyde noun (organic compound) An organic compound (CH3CHO). Sometimes called ethanal or acetic aldehyde. See aldehyde. acetamide noun (organic compound) The amide of acetic acid, CH3CONH2. acetate noun (organic chemistry) Any salt or ester of acetic acid. cellulose acetate A transparent sheet used for overlays. A disc of aluminium covered in a wax used to make demonstration copies of a phonograph record. acetic adjective (organic chemistry) Of a pertaining to vinegar; producing vinegar; producing vinegar; as, fermentation. (organic chemistry) Pertaining to, containing, or derived from, acetyl, as ether, acetic acid. The latter is the acid to which the sour taste of vinegar is due. acetic acid noun (organic compound) A clear colourless organic acid, CH3COOH, formed by the oxidation of ethanol; it is used as a solvent and has very many industrial applications; it is the major acidic component of vinegar. acetimeter noun An instrument for estimating the amount of acetic acid in vinegar or in any liquid containing acetic acid. acetin noun (Chemistry): A combination of acetic acid with glycerin - Brande & C acetometer noun Variant of Acetimeter - Brande & C acetone noun (organic compound) A colourless, volatile, flammable liquid ketone, (CH3)2CO, used as a solvent. acetonitrile noun (organic compound) The simplest organic cyanide or nitrile, CH3CN. acetyl noun (organic chemistry) The univalent radical CH3CO- derived from acetic acid. acetylene noun (organic chemistry) Any organic compound having one or more carbon-carbon triple bond; an alkyne. (organic compound) ethyne, Ethyne; the simplest alkyne, a hydrocarbon of formula HC≡CH. It is a colourless gas, with a peculiar, unpleasant odour, formerly used as an illuminating gas, but now used in welding or metallurgy. acetylide noun (organic chemistry) Any organic compound derived from acetylene or a terminal acetylene by replacing a hydrogen atom with a metal. ACID initialism analysis console for intrusion databases (databases) Atomicity, Consistency, Isolation, and Durability (see Wikipedia:ACID, Wikipedia article on this topic) acid anhydride noun (organic chemistry) A class of organic compounds having two acyl groups bonded to the same oxygen atom. They react with water to give carboxylic acids. acidic adjective Being sour or having the strength to neutralize alkalis, or turning a blue litmus paper red. (mineralogy) Containing a high percentage of silica; -- opposed to basic. Of or relating to acid; having the character of an acid, as an acidic solution. acidimetry noun (chemistry) The measurement of the strength of acids, especially by a chemical process based on the law of chemical combinations, or the fact that, to produce a complete reaction, a certain definite weight of reagent is required. acidity noun (acidities) The quality or state of being acid The quality of sour; sourness; tartness; sharpness to the taste, as in the of lemon juice. Med. Excessive acid quality, as in gastric secretions. acidulate verb (acidulat, ing) (transitive) To make something slightly, or moderately acid; to acidify (transitive) To make sour in a moderate degree; to sour somewhat acidulent adjective Having an acid quality; sour; acidulous. Quotations With anxious, face - Thomas Carlyle acrylamide noun (organic compound) The amide of acrylic acid, CH2=CH.CONH2; used in the manufacture of polyacrylamides. acrylic noun (organic chemistry) An acrylic resin. A paint containing an acrylic resin; a painting executed using such a paint. adjective (organic chemistry) Derived from acrylic acid or acrylonitrile. Containing an acrylic resin. acrylic acid noun (organic compound) A colourless liquid unsaturated organic acid, CH2CHCOOH; used as a monomer in the production of acrylic resins; forms acrylate esters by combination with alcohols. acrylic fiber noun synthetic fibers made from a polymer. acrylic resin noun (organic chemistry) Any of many thermoplastic or thermosetting polymers or copolymers of acrylic acid, methacrylic acid, esters of these acids, or acrylonitrile; used in paint and many plastics. acrylonitrile noun (organic compound) A toxic colourless liquid organic compound, CH2=CH.CN, synthesized from propylene and ammonia; used as a monomer in the production of acrylic resins and synthetic rubber. actinide noun (chemistry) any of the 14 radioactive elements of the periodic table that are positioned under the lanthanides to which they have similar chemistry actinism noun (infl, en, noun) That property of electromagnetic radiation that leads to the production of photochemical effects actinium noun a radioactive, metallic chemical element (symbol: Ac) with an atomic number of 89; found in uranium ores activate verb (activat, ing) Put into action Put to work Turn on activated carbon noun (chemistry) A very absorbent form of finely powdered carbon; used in purifying gases, and as an antidote for many poisons. activity noun (WikiSaurus?-link, activity) (activit, ies) The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variety of human activities. Pit row was abuzz with activity. something done as an action or a movement The activity for the morning was a walk to the store. something done for pleasure or entertainment, especially one involving movement or an excursion. Quilting can be a fun activity. Use (of internet, playstation, bank account etc.) acyclic adjective (chemistry) not cyclic; having an open chain structure (graph theory) not cyclic acyl noun (organic chemistry) A class of organic radicals, RCO-, formed by the removal of a hydroxyl group from a carboxylic acid. acyloin noun (organic chemistry) Any Î~+mn~-hydroxy ketone. adamantane noun (organic compound) A polycyclic hydrocarbon, C10H16, having a cagelike structure similar to a portion of the diamond lattice. addition noun (uncountable) The act of adding anything. The addition of five more items to the agenda will make the meeting unbearably long. Anything that is added. (arithmetic) (uncountable) The process of adding. addition reaction noun (chemistry) a reaction in which radicals are added to both sides of a double bond, double or triple bond adduct noun (chemistry) A compound produced by the mixing of two or more chemicals. verb (transitive, physiology) To draw towards a common center or a middle line. - Thomas Huxley adipic acid noun (organic compound) A white crystalline di-carboxylic acid, C4H8(COOH)2; it has many industrial applications, and when condensed with hexamethylene diamine it produces nylon. adsorbate noun a substance which has been adsorbed aerogel noun A solid-state substance similar to gel where the liquid component is replaced with gas. aerosol noun A gaseous or airborne cloud of particulate matter, either as a solid, liquid, or gas, which forces another substance out of a spray can. An was used to force the flea powder out of the can. (physical chemistry) A colloidal system in which the dispersed phase is composed of either solid or liquid particles and in which the dispersal medium is some gas, usually air. adjective In a gaseous or airborne cloud of particulate matter, either solid, liquid, or gas The paint came as a can of fast-drying spray. affinity noun (affinities) A family relationship through marriage of a relative, as opposed to consanguinity. (e.g. sister-in-law). A kinsman or kinswoman of such relationship. Affinal kinsman or kinswoman. Any romantic relationship. Any passionate love for something. (chemistry) An attractive force between atoms, or groups of atoms, that contributes towards their forming bonds The attraction between an antibody and an antigen AG initialism Attorney General agarose noun a polymeric cross-linked polysaccharide extracted from the seaweed agar; used to make gels that are used in electrophoresis agent noun One who exerts power, or has the power to act; an actor. Heaven made us agents, free to good or ill. --Dryden. One who acts for, or in the place of, another, by authority from him; one intrusted with the business of another; a substitute; a deputy; a factor. An active power or cause; that which has the power to produce an effect; as, a physical, chemical, or medicinal agent; as, heat is a powerful agent. (computing) In the client-server model, the part of the system that performs information preparation and exchange on behalf of a client or server. Especially in the phrase “intelligent agent” it implies some kind of automatic process which can communicate with other agents to perform some collective task on behalf of one or more humans. alabamine noun (context, element, obsolete) Former name for chemical element astatine. alanyl noun (organic compound) The univalent acyl radical, CH3CH(NH2)CO-, derived from the amino acid alanine. alcohol noun (uncountable) An intoxicating beverage made by the fermentation of sugar or sugar-containing material. (context, organic chemistry, countable) Any of a class of organic compounds (such as ethanol) containing a hydroxyl functional group(-OH). alcoholate noun (context, obsolete, chemistry) A crystalline salt containing alcohol in place of water of crystallization. An alcoholic extract of plant material; a tincture. (organic chemistry) An alkoxide. alcoholometer noun A specialized form of hydrometer used to measure the amount of alcohol in a liquid (such as beer) alcoholysis noun (chemistry) solvolysis using an alcohol aldehyde noun (organic chemistry) Any of a large class of reactive organic compounds (R·CHO) having a carbonyl functional group attached to one hydrocarbon radical and a hydrogen atom. aldose noun (context, organic chemistry, carbohydrate) Any of a class of monosaccharides having an aldehyde or hemiacetal functional group. alginic acid noun a gum (a carboxylated polysaccharide), extracted from certain seaweeds, used as a food additive alicyclic adjective (organic chemistry) Of a class of organic compounds having both aliphatic (chain) and cyclic (ring) structure. aliphatic adjective (organic chemistry) Of a class of organic compounds in which the carbon atoms are arranged in an open chain. alkali noun (alkal, ies, pl2=alkalis) Soda ash; caustic soda, caustic potash, etc. (Chemistry) One of a class of caustic bases, such as soda, potash, ammonia, and lithia, whose distinguishing peculiarities are solubility in alcohol and water, uniting with oils and fats to form soap, neutralizing and forming salts with acids, turning to brown several vegetable yellows, and changing reddened litmus to blue. (Western United States) Soluble mineral matter, other than common salt, contained in soils of natural waters. alkalimeter noun A device used to measure alkalinity alkaline adjective Of, or relating to an alkali. (chemistry) Having a pH greater than 7 alkalinity noun (alkalinities) (chemistry) The state of being, or the degree to which a thing is, alkaline. alkalize verb (alkaliz, ing) To cause to become more basic and less acidic. alkane noun (organic chemistry) Any of saturated hydrocarbons including methane, ethane and compounds with long carbon chain known as paraffins etc., having a chemical formula of the form CnH2n+2. alkene noun (organic chemistry) An unsaturated, aliphatic hydrocarbon with one or more carbon-carbon double bonds. alkoxide noun (organic chemistry) Any organic compound derived from an alcohol by replacement of a hydrogen atom with a metal or other cationic species. alkoxy noun (chemistry) any univalent radical R-O-, or anion R-O-, where R is an alkyl group alkyd noun A synthetic resin derived from a reaction between alcohol and certain acids, used as a base for many laminates, paints and coatings. alkyl noun (organic chemistry) Any of a series of univalent radicals of the general formula CnH2n+1 derived from aliphatic hydrocarbons. alkyne noun (organic chemistry) A hydrocarbon containing at least one carbon-carbon triple bond. allomorph noun (chemistry) any of the different crystalline forms of a substance (linguistics) any of the different phonological representations of a morpheme allotrope noun (chemistry) Any form of an element that has a distinctly different molecular structure to another form of the same element. Ozone (O3) is an of oxygen, normally O2 Note: Different structural forms of a compound are isomers. allotropic adjective (chemistry) Describing a form of an element that exhibits allotropy. Graphite and diamond are forms of carbon. allotropy noun uncountable (chemistry) A property, exhibited by some elements of existing in multiple forms with different atomic structures. allyl noun (organic chemistry) An organic radical, C3H5, existing especially in oils of garlic and mustard. alpha noun The name of the first letter of the Greek alphabet (Α,  Î~+mn~), followed by beta. In the Latin alphabet it is the predecessor to A. (context, science) The name of the symbol, symbols Α and Î~+mn~ used in science and mathematics, often interchangeable with the symbols when used as a prefix. : alpha particle ("Î~+mn~-particle") The highest scientific caste of people in the novel w:Brave New World, Brave New World by w:Aldous Huxley, Aldous Huxley. In finance, the amount by which a given asset or portfolio's return exceeds a "riskless" rate of return. adjective Designates the first in an order of precedence. alpha male, male (star) Designates the brightest star in a constellation. Alpha Centauri, Alpha Centauri aludel noun a pear-shaped pot with an opening at each end, formerly used for sublimation. alum noun (chemistry) A double sulphate formed of aluminum and some other element (especially an alkali metal) or of ammonium. alumina noun A name for aluminium oxide used especially in mining, material sciences and ceramics. aluminate noun (chemistry) A compound, containing aluminium and oxygen with more electropositive elements, that is a salt of the hypothetical aluminic acid aluminiferous adjective containing, or yielding aluminum or its ore aluminum noun A metallic chemical element (symbol Al) with an atomic number of 13. aluminum chloride noun (inorganic compound) Alternative spelling of aluminium chloride. aluminum hydroxide noun alternative spelling of aluminium hydroxide AM initialism (Sometimes lower case) From Latin ante meridiem, meaning "before noon (12:00)". See also: A.M. Amplitude Modulation Contrasted with FM Assembly Member, a title similar to MP, placed after the name of a Member of the Welsh National Assembly. Artium Magister or Master of Arts amaranth noun any of various trees, of the genus Amaranthus the seed of these plants, used as a cereal a red to purple azo dye used as a food colouring and in cosmetics americium noun (element) The chemical element (symbol Am) with an atomic number of 95. amic adjective (context, obsolete, chemistry) Of, relating to, or derived from ammonia. (chemistry) Of, relating to, or derived from an amine, amide or amic acid. amide noun (organic chemistry) Any derivative of an oxoacid in which the hydroxyl group has been replaced with an amino or substituted amino group; especially such derivatives of a carboxylic acid, the carboxamides. (inorganic chemistry) Any ionic derivative of ammonia in which a hydrogen atom has been replaced with a metal cation. amidine noun (chemistry) any of several classes of organic compound, formally derived from oxoacids, by replacement of the hydroxy group with an amino group, and the oxo group with =NR i.e RnX(=O)OH => RnX(=NR)NR2 where X is C, S, P etc amine noun (inorganic chemistry) A functional group formally derived from ammonia by replacing one, two or three hydrogen atoms with hydrocarbon or other radicals. (organic chemistry) Any organic compound containing an amine functional group. amino noun (chemistry) The amine functional group. adjective (chemistry) Relating to an amine. ammonia noun (inorganic compound) A gaseous compound of hydrogen and nitrogen, NH3, with a pungent smell and taste. ammonium noun (inorganic chemistry) The univalent NH4+ cation, derived by the protonation of ammonia. ammonium carbonate noun (chemical compound) The ammonium salt of carbonic acid, (NH4)2CO3; a white powder, smelling of ammonia, used in the preparation of smelling salts and baking powder. ammonium chloride noun (chemical compound) A water-soluble salt of ammonia and hydrochloric acid, having the formula NH4Cl. ammonium hydroxide noun (chemical compound) The ionic base, NH4+OH-, obtained by dissolving ammonia in water. amorphous adjective lacking a definite form or clear shape The enormous pile of spaghetti landed in an amorphous heap on the floor. being without definite character or nature lacking organization or unity (physics) A state of solid that is not in crystal and its regular structure is crystal. amphoteric adjective (chemistry) Having the characteristics of both an acid and a base, and capable of reacting as either; amphiprotic. amyl noun (organic chemistry) A hydrocarbon radical, C5H11, of the paraffine series found in amyl alcohol or fusel oil, etc. amyl alcohol noun (organic compound) Any of the isomers of pentanol, C5H11OH; the principal constituent of fusel oil. analogue noun (countable) Something that bears an analogy to something else. (countable) (Biology) An organ or structure that is similar in function to one in another kind of organism but is of dissimilar evolutionary origin. (chemistry) A structural derivative of a parent compound that often differs from it by a single element. adjective (notcomparable) (Of a device or system) in which the value of a data item (such as time) is represented by a continuously variable physical quantity that can be measured (such as the shadow of a sundial) anhydride noun (chemistry) any compound formally derived from another (or from others) by the loss of a water molecule, especially acid anhydrides anhydrous adjective having little or no water (chemistry) having no water of crystallization anilide noun (organic chemistry) Any organic compound derived from an oxoacid by replacement of a hydroxyl group by an aniline residue; an amide of aniline. (organic chemistry) Any compound in which one of the nitrogen-bound hydrogen atoms of aniline is replaced by a metal or other cation. aniline noun (organic compound) A colourless oily basic poisonous liquid used in the manufacture of dyes and pharmaceuticals. (organic compound) The simplest aromatic amine, C6H5NH2, synthesized by the reduction of nitrobenzene. anion noun An electronegative element, or the element which, in electro-chemical decompositions, is evolved at the anode; -- opposed to cation. anthracene noun (organic compound) A tricyclic aromatic hydrocarbon (an acene containing three fused rings) obtained from coal tar; used in the manufacture of wood preservatives, insecticides and the dye alizarin; it is isomeric with phenanthrene. anthraquinone noun (organic compound) A tricyclic quinone, derived from anthracene. (organic chemistry) Any derivative of this parent compound, mostly natural pigments or synthetic dyes. antichlor noun (chemistry) Any substance used to remove excess chlorine or hypochlorite from textiles etc after bleaching; typically sodium thiosulfite antimonate noun (inorganic chemistry) Any salt or ester of antimonic acid. antimonic adjective Of or containing antimony. (inorganic chemistry) Containing trivalent antimony. antimonic acid noun (inorganic compound) The antimony analogue of phosphoric acid, H3SbO?4 antimonide noun (inorganic chemistry) Any compound of antimony with more electropositive elements. antimonous adjective (inorganic chemistry) (alternative form of, antimonious) antioxidant noun any substance that acts to slow or prevent the oxidation of another chemical in nutrition, one of a group of vitamins that act against the effects of free radicals adjective acting or havirng agents that act against oxidation aqua fortis noun (abbreviatedA.F.) (context, inorganic compound, obsolete) An old name for nitric acid. (alchemy) A corrosive liquor made of saltpeter, serving as a solvent for dissolving silver and all other metals except gold. aqua regia noun (abbreviationA.R.) An extremely powerful acid mixture composed of three parts concentrated hydrochloric acid to one part concentrated nitric acid. arachidic acid noun (fatty acid) A long-chain fatty acid, CH3(CH2)18COOH, found in groundnut oil; it has a melting point of 75.4 °C argentic adjective Of, pertaining to or containing silver. (chemistry) Of certain compounds, containing silver in a lower proportion than in argentous compounds. argentous adjective Of, pertaining to or containing silver. (chemistry) Of certain compounds, containing silver in a higher proportion than in argentic compounds. argon noun a chemical element (symbol Ar) with an atomic number of 18. aromatic noun A fragrant plant or spice added to a dish to flavour it. adjective fragrant, Fragrant or spicy. (organic chemistry) Having a closed ring of alternate single and double bonds; derivatives of the hydrocarbon, benzene. aromatic compound noun (organic chemistry) Any compound which exhibits aromaticity. aromaticity noun (organic chemistry) The property of organic compounds which have at least one conjugated ring of alternate single, single bond and double bonds, and exhibit extreme stability. arsenate noun (chemistry) Any salt or ester of arsenic acid. (chemistry) The anion AsO?43-. arsenic noun A nonmetallic chemical element (symbol As) with an atomic number of 33. arsenic trioxide, Arsenic trioxide. adjective Of, or containing arsenic with a valence of 5. arsenic acid noun (chemical compound) A poisonous, white crystalline compound, H3AsO?4, formed from arsenic pentoxide and water; it has the same structure as phosphoric acid, and is used in the manufacture of arsenates. arsenide noun arsenide ion; an arsenic atom with three extra electrons and charge −3 a compound with arsenic in oxidation state −3. arsenious adjective of, or containing arsenic with a valence of 3 arseniuretted hydrogen noun (context, obsolete, chemical compound) The compound arsine. arsenous adjective (chemistry) of, related to, or derived from arsenic, especially in an oxidation state of three; arsenious arsine noun (context, chemical compound, uncountable) A compound of arsenic and hydrogen, AsH?3, a colorless and exceedingly poisonous gas, having an odor like garlic. (context, organic chemistry, countable) Any organic derivative of this compound, or of diarsane, triarsane etc. aryl noun (organic chemistry) Any univalent organic radical derived from an aromatic hydrocarbon by removing a hydrogen atom. AS abbreviation Anglo-Saxon Advanced Supplementary (neurology) Asperger's Syndrome (geography) American Samoa asafetida noun (alternative spelling of, asafoetida) asphalt noun A sticky, black and highly viscous liquid or semi-solid that is present in most crude petroleums and in some natural deposits. Asphalt is composed almost entirely of bitumen. Often used as an abbreviation for asphalt concrete. A hard ground covering used for roads and walkways (wikipedia, asphalt concrete)       association noun The act of associating. The state of being associated. A group of persons associated for a common purpose; an organization; society. A connection to or an affiliation with something. astatine noun (element) A highly radioactive chemical element (symbol At) with atomic number 85 and one of the halogens. atmosphere noun (wikipedia, atmosphere, Atmosphere (layer of gases)) The gases surrounding the Earth or any astronomical body. The air in a particular place. The mood or feeling in a situation. atomic adjective Of, or relating to atoms A stream of hydrogen is emitted Of, or employing nuclear energy or processes We built a small bomb in the garage Infinitesimally small The hairs on a bedbug are almost Unable to be split or made any smaller A bit is an item of data atomicity noun (atomicities) (uncountable) the abstract state of being atomic (that is, of being indivisible) http://groups.google.com/group/alt.usage.english/browse_frm/thread/a9fc46bd33395cd3/f5fe5b4cd9f4da2a f5fe5b4cd9f4da2a (chemistry) the number of atoms in a molecule (computing) the state of a system (often a database system) in which either all stages complete or none complete atomic number noun (chemistry) The number, equal to the number of protons in an atom that determines its chemical properties. Symbol: Z atomic weight noun Former term for the more specific relative atomic mass. A term used to represent the mean relative atomic mass of an element in nature, as distinct from the relative atomic mass of a single isotope. AU initialism astronomical unit Australia African Union auric adjective (inorganic chemistry) Containing trivalent gold. (obsolete) Of, or pertaining to the ear; aural aurous adjective Relating to gold. Containing gold. (inorganic chemistry) Containing univalent gold. Aurum proper noun a sweet Italian liqueur, having a golden yellow colour, manufactured from brandy, oranges and saffron autoclave noun A strong, pressurized, heated vessel, as for laboratory experiments, sterilization, cooking or mineral processing. verb (transitive) To sterilize laboratory equipment in an . auxochrome noun (obsolete),(chemistry) any atom or group which, when added to a chromophore, causes a bathochromic shift in its spectrum Avogadro's number noun (context, chemistry, physics) The number of atoms present in 0.012 kilograms of isotopically pure Carbon-12, being 6.0221415 x 1023. By definition, the number of elementary entity, entities (atoms or molecules) comprising one mole of a given substance. azeotrope noun (context, physical chemistry, physics) A mixture of two or more substances whose liquid and gaseous forms have the same composition (at a certain pressure); the substances cannot be separated by normal distillation. azide noun (chemistry) the univalent N3 radical or functional group or any ester containing this group (chemistry) the N3- anion or any salt containing this anion azine noun (organic chemistry) Any of a class of organic compounds, having the general formula R2C=NN=CR2, produced by the action of a carbonyl compound with hydrazine. azo adjective azote, nitrogen Applied loosely to compounds having nitrogen variously combined, as in cyanides, nitrates, etc. Now especially applied to compounds containing a two atom nitrogen group uniting two hydrocarbon radicals, as in azobenzene etc. azobenzene noun (chemistry) an aromatic azo compound, di-phenyl diazene, the basis of many dyes azo dye noun (chemistry) any of a large number of yellow to red synthetic dyes that contain an azo or diimide (-N=N-) functional group azote noun (archaic) Nitrogen. azotic adjective (context, chemistry, obsolete) Pertaining to azote, or nitrogen; formed or consisting of azote; as, azotic gas; azotic acid. (obsolete) Fatal to animal life. azotize verb (azotiz, ing) (transitive) (obsolete) To impregnate with azote (nitrogen). Browse the Dictionary A B C D E F G H I J K L M N O P Q R S T U V W X Y Z  Find:   Words Starting With:   Words Ending With:   Words Containing:   Words That Match:   Translate Into: Dutch   French   German    Italian   Spanish     Show 5 10 15 20 25 50 100 250 500 results per page.

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