Now updated for CSW19. New words, if any, and new inflections of existing words, are shown in red.
| acetoxyl | a univalent radical. |
| acetylate | to introduce the acetyl radical into (a compound). |
| acetylative | acting as an acetylate. |
| acrylyl | a type of monovalent group. |
| adenyl | a univalent radical. |
| alanyl | a universal radical. |
| alkoxy | containing a univalent radical composed of alkyl united with oxygen. |
| allyl | an organic radical existing esp in oils of garlic and mustard. |
| allylic | of or like an allyl, a kind of organic radical. |
| alphyl | a univalent radical. |
| amyl | a univalent radical. |
| arsino | containing a certain univalent chemical radical. |
| aryl | any aromatic univalent hydrocarbon radical. |
| benzal | a radical whose oxide is benzaldehyde or oil of bitter almonds. |
| benzenecarbonyl | a systemic name for benzoyl. |
| benzil | a double benzoyl radical. |
| benzoyl | a compound radical, the base of benzoic acid. |
| benzyl | a compound radical, related to toluene and benzoic acid. |
| benzylic | of or like benzyl. |
| benzylidine | a radical whose oxide is benzaldehyde or oil of bitter almonds. |
| biphenyl | a hydrocarbon consisting of two phenyl groups, used as a fungicide and in dye-manufacture. |
| butyl | a compound radical, regarded as butane, less one atom of hydrogen. |
| carbamoyl | a radical derived from carbamic acid. |
| carbamyl | a radical derived from carbamic acid. |
| carbene | a neutral divalent free radical, such as methylene. |
| carbonyl | the divalent group CO, present in ketones, aldehydes, etc. |
| carbonylic | relating to carbonyl. |
| carboxyl | the radical COOH. |
| carboxylic | relating to carboxyl. |
| cetyl | a univalent radical. |
| chromyl | a bivalent radical. |
| cinnamyl | a radical found in cinnamic compounds. |
| dibutyl | having two butyl groups. |
| ethinyl | a univalent chemical radical. |
| ethoxy | a univalent chemical radical. |
| ethoxyl | a univalent chemical radical. |
| ethyl | the base (C2H5) of common alcohol, ether, etc. |
| ethynyl | a univalent chemical radical. |
| ferrocyanogen | the quadrivalent radical of the ferricyanides. |
| formyl | a radical derived from formic acid. |
| galactosyl | a glycosyl radical derived from galactose. |
| glyceryl | a radical derived from glycerol by the removal of one or more hydroxyl groups. |
| glycosyl | a radical derived from glucose. |
| glycyl | a radical derived from glycine. |
| hexadecyl | another name for the radical cetyl. |
| hexyl | a radical derived from a hexose. |
| hexylic | of or like hexyl. |
| homolytic | decomposing into two uncharged atoms or radicals. |
| hydroxyl | a compound radical, or unsaturated group, HO, consisting of one atom of hydrogen and one of oxygen. |
| hydroxylic | pertaining to a hydroxyl. |
| isopropyl | a radical derived from propane. |
| mercaptan | a substance analogous to an alcohol, with sulphur instead of oxygen. |
| methoxyl | containing the radical CH3O, derived from methanol. |
| methyl | the radical (CH3) of wood (or methyl) alcohol. |
| methylene | the radical CH2, which is the basic unit of hydrocarbon chains. |
| naphthyl | a hydrocarbon radical regarded as the essential residue of naphthalene. |
| nitrosyl | the radical NO, called also the nitroso group. |
| nitroxyl | the group NO2, usually called the nitro group. |
| nitryl | the group NO2, usually called the nitro group. |
| octyl | a type of hydrocarbon radical. |
| oxonium | a univalent basic radical in which oxygen is tetravalent. |
| pentyl | a radical derived from a pentane. |
| phenoxy | containing a radical derived from phenol. |
| phenyl | a cyclic radical derived from benzene by the loss of one hydrogen atom. |
| phenylic | pertaining to, derived from, or containing, phenyl. |
| phosphonium | the radical PH4, analogous to ammonium. |
| phosphoryl | the radical PO, regarded as the typical nucleus of certain compounds. |
| propenyl | a hydrocarbon radical related to propene. |
| propyl | the hypothetical radical C3H7, regarded as the essential residue of propane and related compounds. |
| propylamine | an amine of propyl. |
| radical | fundamental (noun) a group of atoms behaving like a single atom and passing unchanged from one compound to another |
| radically | (Adv.) RADICAL, fundamental. |
| succinyl | the radical of succinic acid. |
| sulfinyl | the bivalent chemical group, SO. |
| sulfonium | the positively charged group SH3, its salts or derivatives. |
| sulfonyl | a bivalent sulphone group. |
| sulfuryl | a bivalent sulphone group. |
| sulphinyl | the bivalent chemical group SO. |
| sulphonium | the positively charged group SH3, its salts or derivatives. |
| toluyl | any one of the three hypothetical radicals corresponding to the three toluic acids. |
| tolyl | a hydrocarbon radical, CH3. |
| triatomically | (Adv.) TRIATOMIC, having three atoms. |
| univalency | the state of being univalent. |
| univalent | having a valency of one, capable of combining with one atom of hydrogen or its equivalent; (noun) a univalent radical. |
| uranyl | the radical UO2, present in some compounds of uranium. |
| vinylidene | a bivalent radical, a compound of carbon and hydrogen. |