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Glossary of Chemistry Terms
beginning with letter I
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I Tweet Definition of I Like Definition of I on Facebook
noun
  1. The capitalisation, capitalised ninth letter of the Appendix:Roman script, English alphabet, preceded by H and followed by J.
pronoun (desc=personal pronoun, objective, me, possessive, my, possessive noun, mine, reflexive, myself)
  1. The speaker or writer, referred to as the grammatical subject of a sentence.
, + Inflection
, -
, object , ,
me
, -
, reflexive , ,
myself
, -
, possessive , ,
mine or my
=      
ignite Tweet Definition of ignite Like Definition of ignite on Facebook
verb (ignit, ing)
  1. to set fire (to something), to light (something)
  2. to spark off (something), to enthuse
IL Tweet Definition of IL Like Definition of IL on Facebook
abbreviation
  1. Illinois, a state of the United States of America.
imide Tweet Definition of imide Like Definition of imide on Facebook
noun
  1. (chemistry) a form of amide in which the nitrogen atom is attached to two carbonyl groups - R1CONHCOR2
imidogen Tweet Definition of imidogen Like Definition of imidogen on Facebook
noun
  1. (organic chemistry) A nitrene.
imine Tweet Definition of imine Like Definition of imine on Facebook
noun
  1. (organic chemistry) Any of a class of organic nitrogen compounds having the general formula R2C=NR; they are tautomeric with enamines.
imino Tweet Definition of imino Like Definition of imino on Facebook
noun
  1. (chemistry) The divalent radical =NH
indamine Tweet Definition of indamine Like Definition of indamine on Facebook
noun
  1. (chemistry) any of a range of organic bases related to phenazine; they form indigo-coloured salts used in making dyes
india rubber Tweet Definition of india rubber Like Definition of india rubber on Facebook
nounIndia rubber
  1. The latex obtained from certain trees, especially those of the genera Hevea and Ficus
  2. The rubber made from this latex
indium Tweet Definition of indium Like Definition of indium on Facebook
noun
  1. a metallic chemical element (symbol In) with an atomic number of 49.
indole Tweet Definition of indole Like Definition of indole on Facebook
noun
  1. (chemistry) An organic compound, C8H7N, found in coal tar, and produced in the gut by the bacterial decomposition of tryptophan; it is an aromatic bicyclic heterocycle having a benzene ring fused with a pyrrole ring; indole and its derivatives occur widely in nature and have many industrial applications.
  2. (chemistry) Any of the derivatives of indole1.
inert Tweet Definition of inert Like Definition of inert on Facebook
adjective
  1. unable to move or act
  2. sluggish or lethargic
  3. in chemistry, not readily reacting with other elements or compounds
  4. having no therapeutic action
inert gas Tweet Definition of inert gas Like Definition of inert gas on Facebook
noun
  1. (chemistry) A gas which does not undergo chemical reactions.
  2. (context, chemistry, specifically) A noble gas.
inhibit Tweet Definition of inhibit Like Definition of inhibit on Facebook
verb
  1. to hinder; to restrain
inhibition Tweet Definition of inhibition Like Definition of inhibition on Facebook
noun
  1. the act of inhibiting.
  2. the state of being inhibited.
  3. something that inhibits.
inhibitor Tweet Definition of inhibitor Like Definition of inhibitor on Facebook
noun
  1. (chemistry) Any substance capable of stopping or slowing a specific chemical reaction.
inorganic Tweet Definition of inorganic Like Definition of inorganic on Facebook
adjective
  1. (chemistry) relating to a compound that does not contain carbon
inorganic chemistry Tweet Definition of inorganic chemistry Like Definition of inorganic chemistry on Facebook
noun
  1. (chemistry) The chemistry of the elements (including carbon), and those compounds that do not contain carbon.
intermediate Tweet Definition of intermediate Like Definition of intermediate on Facebook
noun
  1. anything in an intermediate position
  2. an intermediary
  3. (chemistry) any substance formed as part of a series of chemical reactions that is not the end-product
adjective
  1. occurring between two extremes, or in the middle of a range
inulin Tweet Definition of inulin Like Definition of inulin on Facebook
noun
  1. (chemistry) a polysaccharide found in the roots and tubers of certain plants, especially the Compositae; it is mostly a polymer of fructose
invert Tweet Definition of invert Like Definition of invert on Facebook
noun
  1. (archaic) A homosexual man.
  2. (context, architecture) An upside-down arch (as in a sewer.)
verb
  1. To turn upside down or inside out.
  2. (music) To move the root note of a chord up or down an octave, resulting in a change in pitch.
invert sugar Tweet Definition of invert sugar Like Definition of invert sugar on Facebook
noun
  1. An equal mixture of glucose and fructose formed by the enzymatic hydrolysis of sucrose; it is found in honey and some fruits, and also produced industrially
iodate Tweet Definition of iodate Like Definition of iodate on Facebook
noun
  1. (chemistry) The anion IO3-; Any salt of iodic acid.
iodic Tweet Definition of iodic Like Definition of iodic on Facebook
adjective
  1. (chemistry) of, or relating to iodine or its compounds, especially those in which it has a valency of five
iodide Tweet Definition of iodide Like Definition of iodide on Facebook
noun
  1. (chemistry) A binary compound of iodine and another element or radical.
ionic bond Tweet Definition of ionic bond Like Definition of ionic bond on Facebook
noun
  1. (chemistry) A type of chemical bond where two atoms or molecules are connected to each other by electrostatic attraction.
ionomer Tweet Definition of ionomer Like Definition of ionomer on Facebook
noun
  1. (chemistry) a polymer, or a biological macromolecule (such as a protein) in which a small but significant proportion of the constituent monomers have ionic groups
iridic Tweet Definition of iridic Like Definition of iridic on Facebook
adjective
  1. (chemistry) containing tetravalent iridium
iridium Tweet Definition of iridium Like Definition of iridium on Facebook
noun
  1. A metallic chemical element (symbol Ir) with an atomic number of 77.
iron Tweet Definition of iron Like Definition of iron on Facebook
noun
  1. (context, uncountable) A metallic chemical element having atomic number 26, and symbol Fe.
  2. (context, countable) A tool or appliance made of metal, which is heated and then used to transfer heat to something else; most often a thick piece of metal fitted with a handle and having a flat, roughly triangular bottom, which is heated and used to press wrinkles from clothing, and now usually containing an electrical heating apparatus.
  3. (context, usually plural, irons) Shackles.
  4. (slang) A handgun.
  5. (context, uncountable) A dark shade of the colour/color silver.
  6. (context, Cockney rhyming slang, shortened from iron hoof, rhyming with poof; countable, offensive, ) A male homosexual.
verb
  1. (transitive) To pass an iron over (clothing or some other item made of cloth) in order to remove creases.
adjective (more iron, most iron)
  1. {not comparable} Made of the metal iron.
  2. (context, figuratively) Strong (as of will), inflexible.
She had an iron will.
He held on with an iron grip.
iron vitriol Tweet Definition of iron vitriol Like Definition of iron vitriol on Facebook
noun
  1. (obsolete),(chemistry) iron(II) sulfate
isoamyl Tweet Definition of isoamyl Like Definition of isoamyl on Facebook
noun
  1. (chemistry) the organic radical derived from isoamyl alcohol; 3-methyl butyl
isocyanate Tweet Definition of isocyanate Like Definition of isocyanate on Facebook
noun
  1. (chemistry) the univalent radical -N=C=O (tautomeric with cyanate), and any of its hydrocarbyl derivatives R-N=C=O
isocyanide Tweet Definition of isocyanide Like Definition of isocyanide on Facebook
noun
  1. (chemistry) the isomer HN+C- of hydrocyanic acid HCN
  2. (chemistry) any of its hydrocarbyl derivatives RNC
isocyclic Tweet Definition of isocyclic Like Definition of isocyclic on Facebook
adjective
  1. (chemistry) homocyclic
isoelectric point Tweet Definition of isoelectric point Like Definition of isoelectric point on Facebook
noun (abbreviated as pI)
  1. (physics),(chemistry) the pH of a colloidal suspension or of an ampholyte at which the solute does not move in an electrophoretic field
isomer Tweet Definition of isomer Like Definition of isomer on Facebook
noun
  1. (chemistry) Any of two or more compounds with the same molecular formula but with different structure.
  2. (physics) Any of two or more nuclei with the same mass number and atomic number but with different radioactive properties.
isomerism Tweet Definition of isomerism Like Definition of isomerism on Facebook
noun
  1. (chemistry) the phenomenon of the existence of isomers - the existence of different substances with the same molecular formulae
isomerize Tweet Definition of isomerize Like Definition of isomerize on Facebook
verb
  1. (chemistry) to convert a compound into a different isomeric form
isooctane Tweet Definition of isooctane Like Definition of isooctane on Facebook
noun
  1. (chemistry) any isomer of n-octane; especially 2,2,4-trimethylpentane, used as a reference in the determination of the octane number of fuel
isoprene Tweet Definition of isoprene Like Definition of isoprene on Facebook
noun
  1. (organic compound) An unsaturated hydrocarbon, C5H8, that is readily polymerized; natural rubber (caoutchouc) is cis-1,4-polyisoprene, and trans-1,4-polyisoprene is present in gutta-percha and balata; it is the structural basis for the terpenes.
isoprenoid Tweet Definition of isoprenoid Like Definition of isoprenoid on Facebook
noun
  1. (organic chemistry) Any compound formally derived from one or more isoprene unit.
isopropyl Tweet Definition of isopropyl Like Definition of isopropyl on Facebook
noun
  1. (chemistry) the univalent organic radical (CH3)2CH-
isothiocyanate Tweet Definition of isothiocyanate Like Definition of isothiocyanate on Facebook
noun
  1. (chemistry) any salt or ester of the hypothetical isothiocyanic acid; or the -NCS radical or the NCS-1 anion; isomeric with thiocyanate
isotonic Tweet Definition of isotonic Like Definition of isotonic on Facebook
adjective
  1. (context, of two solutions) having the same osmotic pressure
  2. (context, of a medical solution) Having the same concentration of solutes as human blood.
Use an saline solution in your neti pot to prevent irritation of your nasal passages.
  1. (context, of two muscles) having equal tension
itaconic acid Tweet Definition of itaconic acid Like Definition of itaconic acid on Facebook
noun
  1. (chemistry) one of the isomeric dicarboxylic acids produced by the distillation of citric acid, or as metabolites by microorganisms, CH2=C(CO2H)-CH2CO2H

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