All Words Glossary

Glossary of Chemistry Terms
beginning with letter S
Browse the Chemistry Glossary

SA Tweet Definition of SA Like Definition of SA on Facebook
  1. Sturmabteilung
  1. South Africa
    1. (medicine) sino-auricular
    2. small arms
  2. South America
    1. South Australia/South Australian
  3. (in gay personal ads) straight-acting
  4. abbreviation for Stage Accompany (SA)
saccharide Tweet Definition of saccharide Like Definition of saccharide on Facebook
  1. (carbohydrate) The unit structure of carbohydrates, of general formula CnH2nOn. Either the simple sugars or polymers such as starch and cellulose. The saccharides exist in either a ring or short chain conformation, and typically contain five or six carbon atoms.
saccharimeter Tweet Definition of saccharimeter Like Definition of saccharimeter on Facebook
  1. A polarimeter used to measure the sugar content of a liquid
saccharometer Tweet Definition of saccharometer Like Definition of saccharometer on Facebook
  1. A hydrometer used to measure the sugar content of a liquid
sal ammoniac Tweet Definition of sal ammoniac Like Definition of sal ammoniac on Facebook
  1. (alchemy) a rare mineral composed of ammonium chloride found around volcanic fumaroles and guano deposits.
  2. (context, chemistry, archaic) ammonium chloride.
salicylate Tweet Definition of salicylate Like Definition of salicylate on Facebook
  1. (chemistry) any salt or ester of salicylic acid
salimeter Tweet Definition of salimeter Like Definition of salimeter on Facebook
  1. A hydrometer used to measure the concentration of salt in a solution
saline Tweet Definition of saline Like Definition of saline on Facebook
  1. water, Water containing dissolved salt.
  1. (notcomparable) contain, Containing salt.
salinometer Tweet Definition of salinometer Like Definition of salinometer on Facebook
  1. a salimeter
salometer Tweet Definition of salometer Like Definition of salometer on Facebook
  1. a salimeter
salt Tweet Definition of salt Like Definition of salt on Facebook
  1. A common substance recognised chemically as sodium chloride (NaCl?), used extensively as a condiment and preservative.
  2. (chemistry) One of the compounds formed from the reaction of an acid with a base, where a positive ion replaces a hydrogen of the acid.
  3. A kind of marsh at the shore of a sea (short for salt marsh, apparently not in a wide-spread use).
  4. (slang) A sailor (also old salt).
  5. (cryptography) Additional bytes inserted into a plaintext message before encryption, in order to increase randomness and render brute force, brute-force decryption more difficult.
  1. (transitive) To add salt to.
  2. (mining) To blast gold into (as a portion of a mine) in order to cause to appear to be a productive seam.
  3. (cryptography) To add filler bytes before encrypting, in order to make brute-force decryption more resource-intensive.
  4. To include colorful language in.
  5. To insert or inject something into an object to give it properties it would not naturally have.
  1. salty, Salty.
  2. saline, Saline.
salting out Tweet Definition of salting out Like Definition of salting out on Facebook
  1. a technique for the separation of proteins by differential precipitation in a solution of sodium chloride or ammonium sulphate
saltpeter Tweet Definition of saltpeter Like Definition of saltpeter on Facebook
  1. US spelling of saltpetre.
saponify Tweet Definition of saponify Like Definition of saponify on Facebook
verb (saponifies, saponifying, saponified) (transitive and intransitive)
  1. to convert a fat or oil into soap; to be converted into soap
  1. (chemistry) to hydrolyze an ester using an alkali
saran Tweet Definition of saran Like Definition of saran on Facebook
  1. A plastic resin used to make packaging films.
saturate Tweet Definition of saturate Like Definition of saturate on Facebook
verb (saturat, ing)
  1. To cause to become completely penetrated, impregnated, or soaked; imbue.
After walking home in the driving rain, his clothes were saturated.
  1. To satisfy the affinity of; to cause a substance to become inert by chemical combination with all that it can hold.
One can phosphorus with chlorine.
SC Tweet Definition of SC Like Definition of SC on Facebook
  1. South Carolina, a state of the United States of America.
  2. Superior Court.
  3. Supreme Court.
  4. StarCraft?, a strategy PC game.
  5. Status conference.
  6. Settlement Conference.
  7. Small claims.
  8. State College, as used with proper names.
  9. Senior Counsel
  10. Security Council of the United Nations
scandium Tweet Definition of scandium Like Definition of scandium on Facebook
noun (Symbol: Sc)
  1. a metallic chemical element, atomic number 21, obtained from some uranium ores; it is a transition element.
scavenger Tweet Definition of scavenger Like Definition of scavenger on Facebook
  1. (obsolete) A street sweeper.
    1. Someone who scavenges, especially one who searches through rubbish for food or useful things.
    2. An animal that feeds on decaying matter such as carrion.
  2. (chemistry) A substance used to remove impurities from the air or from a solution.
scission Tweet Definition of scission Like Definition of scission on Facebook
  1. the act of division, separation, cutting or sever, severing
  2. cleavage
scrub Tweet Definition of scrub Like Definition of scrub on Facebook
  1. One who labors hard and lives meanly; a mean fellow.
We should go there in as proper a manner possible; nor altogether like the scrubs about us.
  1. Something small and mean.
  2. A worn-out brush.
  3. A thicket or jungle, often specified by the name of the prevailing plant; as, oak scrub, palmetto scrub, etc.
  4. (Stock Breeding): One of the common livestock of a region of no particular breed or not of pure breed, esp. when inferior in size, etc. Often used to refer to male animals unsuited for breeding.
  5. Vegetation of inferior quality, though sometimes thick and impenetrable, growing in poor soil or in sand; also, brush. See brush, above.
  6. (Gaming): One who is no longer new to a game but still exhibits novice tendencies. "What a scrub."
verb (scrub, b, ing)
  1. (transitive) To rub hard; to wash with rubbing; usually, to rub with a wet brush, or with something coarse or rough, for the purpose of cleaning or brightening; as, to scrub a floor, a doorplate.
  2. (intransitive) To rub anything hard, especially with a wet brush; to scour; hence, to be diligent and penurious; as, to scrub hard for a living.
  3. (transitive) To call off a scheduled event; to cancel.
Engineers had to the satellite launch due to bad weather.
  1. Mean; dirty; contemptible; scrubby.
"How solitary, how scrub, does this town look!" -Walpole.
"No little joint shall come on my board." -Swift.
SE Tweet Definition of SE Like Definition of SE on Facebook
  1. southeast
  1. Second Edition
  2. Special Edition
sealant Tweet Definition of sealant Like Definition of sealant on Facebook
  1. Any material used to seal a surface so as to prevent passage of a fluid.
sebacic acid Tweet Definition of sebacic acid Like Definition of sebacic acid on Facebook
  1. (chemistry) an aliphatic dicarboxylic acid, (CH2)8(COOH)2, originally prepared from tallow; it is used in the manufacture of resins, plasticizers and polyester rubbers
selenate Tweet Definition of selenate Like Definition of selenate on Facebook
  1. (chemistry) any salt or ester of selenic acid
selenic Tweet Definition of selenic Like Definition of selenic on Facebook
  1. (chemistry) of, or containing selenium
selenic acid Tweet Definition of selenic acid Like Definition of selenic acid on Facebook
  1. (chemistry) a solid white acid, H2SeO?4, having the same structure and similar reactions as sulphuric acid
selenide Tweet Definition of selenide Like Definition of selenide on Facebook
  1. (chemistry) any compound in which selenium serves as an anion with an oxidation number of -2
  2. (chemistry) any organic compound of general formula RSeR? (R not = H) analogous to the ethers
selenite Tweet Definition of selenite Like Definition of selenite on Facebook
  1. (mineralogy) a soft, glassy form of gypsum (chemical formula CaSO?4·2H2O)
  2. (chemistry) the anion SeO?32− derived from selenous acid; any salt or ester of senenous acid
semiquinone Tweet Definition of semiquinone Like Definition of semiquinone on Facebook
  1. (chemistry) an intermediate free radical generated in the conversion of quinones to/from hydroquinones
series Tweet Definition of series Like Definition of series on Facebook
noun (series)
  1. A number of things that follow on one after the other or are connected one after the other.
  2. A television or radio program which consists of several episodes that are broadcast in regular intervals
Friends was one of the most successful television series in recent years.
  1. (analysis) The sum of the terms of a sequence.
  2. (cricket) A group of matches between two sides; the aim being to win more matches than the opposition
sesquioxide Tweet Definition of sesquioxide Like Definition of sesquioxide on Facebook
  1. (chemistry) Any oxide containing three oxygen atoms for every two metal atoms
sesquiterpene Tweet Definition of sesquiterpene Like Definition of sesquiterpene on Facebook
  1. (chemistry) any terpene formed from three isoprene units, and having fifteen carbon atoms; includes several plant pigments such as the flavones
Set Tweet Definition of Set Like Definition of Set on Facebook
proper noun (also Seth)
  1. An ancient Egyptian god, variously described as the god of chaos, the god of thunder and storms, or the god of destruction.
SI Tweet Definition of SI Like Definition of SI on Facebook
  1. Smithsonian Institution
side chain Tweet Definition of side chain Like Definition of side chain on Facebook
noun (or side-chain)
  1. (chemistry) in organic chemistry, that part of a molecule attached to some core structure; a radical
  2. (biochemistry) the variable parts of amino acids that extend from the peptide backbone in proteins; they are referred to as R-groups, which branch off the backbone at the alpha carbon (C~+mn~).
Sienna Tweet Definition of Sienna Like Definition of Sienna on Facebook
proper noun
  1. (given name, female) of modern usage from the sienna colour.
silane Tweet Definition of silane Like Definition of silane on Facebook
  1. (chemistry) Any of a group of silicon hydrides that are analogous to the paraffin hydrocarbons; especially the parent compound SiH?4
silica Tweet Definition of silica Like Definition of silica on Facebook
  1. silicon dioxide.
  2. any of the silica group of the silicate minerals.
silica gel Tweet Definition of silica gel Like Definition of silica gel on Facebook
noun silica gel
  1. a granular, porous form of silica made synthetically from sodium silicate and used as a desiccant.
silicate Tweet Definition of silicate Like Definition of silicate on Facebook
  1. (chemistry) Any salt of silica or of one of the silicic acids; any mineral composed of silicates
silicic Tweet Definition of silicic Like Definition of silicic on Facebook
  1. of, related to, or derived from silica
silicic acid Tweet Definition of silicic acid Like Definition of silicic acid on Facebook
  1. (chemistry) any of a range of compounds, being hydrates of silica
    • metasilicic acid H2SiO?3
    • orthosilicic acid H4SiO?4
    • disilicic acid H2Si2O5
    • pyrosilicic acid H6Si2O7
      They form silicates having complex polymeric structures
silicium Tweet Definition of silicium Like Definition of silicium on Facebook
  1. (obsolete),(chemistry) silicon
silicon Tweet Definition of silicon Like Definition of silicon on Facebook
  1. (chemistry) A nonmetallic element (symbol Si) with an atomic number of 14 and atomic weight of 28.0855.
silicon carbide Tweet Definition of silicon carbide Like Definition of silicon carbide on Facebook
  1. (chemistry) a binary compound of silicon and carbon, SiC?; it is one of the hardest known materials, and is used as an abrasive, under the trade name Carborundum, and as a refractory material
silicon dioxide Tweet Definition of silicon dioxide Like Definition of silicon dioxide on Facebook
  1. (chemistry) a hard glassy mineral, SiO?2, occurring as quartz, sand, opal etc. Informally known as silica.
silicone Tweet Definition of silicone Like Definition of silicone on Facebook
  1. (chemistry) a class of inert, semi-inorganic chemistry, inorganic polymeric compounds of silicon, having a wide range of thermal stability and extreme water repellence, used in a very wide range of industrial applications, and in prosthetic replacements for body parts
silicone rubber Tweet Definition of silicone rubber Like Definition of silicone rubber on Facebook
  1. A variety of synthetic polymeric silicones having physical properties similar to natural rubber but increased chemical stability
silicon tetrachloride Tweet Definition of silicon tetrachloride Like Definition of silicon tetrachloride on Facebook
  1. the binary compound of silicon and chlorine SiCl?4
silicon tetrafluoride Tweet Definition of silicon tetrafluoride Like Definition of silicon tetrafluoride on Facebook
  1. the binary compound of silicon and fluorine SiF?4, a colourless, poisonous gas with a pungent odour, used in the production of silicon semiconductors
siloxane Tweet Definition of siloxane Like Definition of siloxane on Facebook
  1. (chemistry) any of a class of inorganic compound having a short repeating unit of silicon and oxygen atoms with organic side chains
silver Tweet Definition of silver Like Definition of silver on Facebook
  1. (uncountable) A lustrous, white, metallic element, atomic number 47, atomic weight 107.87, symbol Ag.
  2. (collectively) Coins made from silver or any similar white metal.
  3. (collectively) Cutlery, whether silver or made from some other white metal (U.S.: silverware).
  4. (collectively) Any items made from silver or any other white metal.
  5. (countable) A shiny gray/grey color/colour.
<table><tr><td>silver colour: &nbsp;</td><td bgcolor="
  1. C0C0C0?" width="80">&nbsp; </td></tr></table>
  1. Made from silver.
  2. Made from another white metal.
  3. Having a color/colour like silver: a shiny gray/grey.
single bond Tweet Definition of single bond Like Definition of single bond on Facebook
  1. (chemistry) a covalent bond in which one electron pair is shared between two atoms
slake Tweet Definition of slake Like Definition of slake on Facebook
verb (slak, ing)
  1. To go out; to become extinct.
  2. To abate; to become less decided.
  3. To slacken; to become relaxed.
  4. To become mixed with water, so that a true chemical combination takes place; as, the lime slakes.
  5. To dash water on a hot surface to cool it.
    • Notes for landscape tones. Long sequences of tempera. Light filtered through the essence of lemons. An air full of brick-dust - sweet smelling brick dust and the odour of hot pavements slaked with water. Lawrence Durrell. Justine. Faber & Faber 1961 p.14
slaked lime Tweet Definition of slaked lime Like Definition of slaked lime on Facebook
  1. calcium hydroxide, a soft white powder, produced by adding water to quicklime. It is used in making mortar and cement, and has many industrial uses.
slurry Tweet Definition of slurry Like Definition of slurry on Facebook
noun (uncountable) Pronunciation
  • (IPA, RP: /ˈslʌri/)
  • :Rhymes: Rhymes:English:-ʌri, -ʌri
    1. A thin mixture of liquid and fine substances such as clay or plaster of Paris.
    2. Liquid waste produced by mountain top removal mining. Usually very toxic. Usually stored nearby in giant dams.
adjective (slurrier, slurriest) Pronunication:
  • (IPA, RP: /ˈslɜri/)
  • :Rhymes: Rhymes:English:-ɜri, -ɜri
    1. Slurred, tending to slur.
    slurry voice
smoke Tweet Definition of smoke Like Definition of smoke on Facebook
  1. (uncountable) Very fine particles and vapor/vapour given off by burning material.
  2. (Military) A particulate of solid or liquid particles dispersed into the air on the battlefield to degrade enemy ground and aerial observation. Smoke has many uses--screening smoke, signaling smoke, smoke curtain, smoke haze, and smoke deception. Thus it is an artificial aerosol.
  3. An instance of smoking a cigarette, cigar, etc.
  • I'm going out for a .
    1. (slang) (countable) A cigarette.
    2. A light grey colour/color tinted with blue.
<table><tr><td>smoke colour: &nbsp;</td><td bgcolor="
  1. D6E2E2?" width="80">&nbsp; </td></tr></table>
    1. (slang) The Smoke: London
verb (smok, ing)
  1. (intransitive) To deliberately inhale smoke, especially from cigarettes.
  • Do you ?
    1. (transitive) To deliberately inhale the smoke from for example a cigarette, cigar, or pipe.
He's smoking his pipe.
  1. (transitive) To preserve by treating with smoke.
We can buy some smoked salmon for the occasion.
  1. (intransitive) To give off smoke.
  1. Of the colour known as smoke.
Sn Tweet Definition of Sn Like Definition of Sn on Facebook
  1. Sunday
soda Tweet Definition of soda Like Definition of soda on Facebook
  1. (uncountable) sodium carbonate, Sodium carbonate.
  2. (uncountable) Sodium in chemical combination.
  3. (uncountable) Carbonated water (originally made with sodium bicarbonate).
  4. (context, US, uncountable) Any carbonated (usually sweet) soft drink.
  5. (context, US, countable) A glass, bottle or can of this drink.
soda ash Tweet Definition of soda ash Like Definition of soda ash on Facebook
  1. industrial-grade sodium carbonate
sodamide Tweet Definition of sodamide Like Definition of sodamide on Facebook
  1. (dated),(chemistry) sodium amide
sodium Tweet Definition of sodium Like Definition of sodium on Facebook
  1. A soft, waxy, silvery reactive metal that is never found unbound in nature, and a chemical element (symbol Na) with an atomic number of 11 and atomic weight of 22.989770.
sodium amide Tweet Definition of sodium amide Like Definition of sodium amide on Facebook
  1. (chemistry) a white solid, NaNH?2 obtained by reacting ammonia with metallic sodium; it is used in the production of hydrazine, and indigo dyes
sodium carbonate Tweet Definition of sodium carbonate Like Definition of sodium carbonate on Facebook
  1. (chemistry) A salt, Na2CO3 formally derived from sodium hydroxide and carbonic acid; it is a white powder, soluble in water, with domestic, commercial and industrial uses
sodium chloride Tweet Definition of sodium chloride Like Definition of sodium chloride on Facebook
  1. Chemical term for common table salt, a compound composed of equal number of sodium and chlorine atoms. Chemical formula NaCl?.
sodium hydroxide Tweet Definition of sodium hydroxide Like Definition of sodium hydroxide on Facebook
  1. (chemistry) a strong, caustic alkali, NaOH?, used in the manufacture of soap, detergents, paper, textiles and having many other industrial applications
sodium sulfite Tweet Definition of sodium sulfite Like Definition of sodium sulfite on Facebook
  1. (