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Ethenyl :: Ethenyl (n.) A univalent hydrocarbon radical of the ethylene series, CH2:CH; -- called also vinyl. See Vinyl..

Artiad :: Artiad (a.) Even; not odd; -- said of elementary substances and of radicals the valence of which is divisible by two without a remainder.

Glyceryl :: Glyceryl (n.) A compound radical, C3H5, regarded as the essential radical of glycerin. It is metameric with allyl. Called also propenyl..

Deutoxide :: Deutoxide (n.) A compound containing in the molecule two atoms of oxygen united with some other element or radical; -- usually called dioxide, or less frequently, binoxide..

Diamine :: Diamine (n.) A compound containing two amido groups united with one or more basic or positive radicals, -- as contrasted with a diamide..

Pentavalent :: Pentavalent (a.) Having a valence of five; -- said of certain atoms and radicals.

Radical :: Radical (n.) A radical quantity. See under Radical, a..

Ultra :: Ultra (n.) One who advocates extreme measures; an ultraist; an extremist; a radical.

Azo- :: Azo- () Now especially applied to compounds containing a two atom nitrogen group uniting two hydrocarbon radicals, as in azobenzene, azobenzoic, etc. These compounds furnish many artificial dyes. See Diazo-..

Amylate :: Amylate (n.) A compound of the radical amyl with oxygen and a positive atom or radical.

Radical :: Radical (n.) A primitive word; a radix, root, or simple, underived, uncompounded word; an etymon..

Pentyl :: Pentyl (n.) The hypothetical radical, C5H11, of pentane and certain of its derivatives. Same as Amyl..

Dicarbonic :: Dicarbonic (a.) Containing two carbon residues, or two carboxyl or radicals; as, oxalic acid is a dicarbonic acid..

Quinogen :: Quinogen (n.) A hypothetical radical of quinine and related alkaloids.

Salicyl :: Salicyl (n.) The hypothetical radical of salicylic acid and of certain related compounds.

Substitutional :: Substitution (n.) The act or process of substituting an atom or radical for another atom or radical; metethesis; also, the state of being so substituted. See Metathesis..

Imide :: Imide (n.) A compound with, or derivative of, the imido group; specif., a compound of one or more acid radicals with the imido group, or with a monamine; hence, also, a derivative of ammonia, in which two atoms of hydrogen have been replaced by divalent basic or acid radicals; -- frequently used as a combining form; as, succinimide..

Mon- :: Mon- () A prefix signifying one, single, alone; as, monocarp, monopoly; (Chem.) indicating that a compound contains one atom, radical, or group of that to the name of which it is united; as, monoxide, monosulphide, monatomic, etc..

Radical :: Radical (n.) Specifically, a group of two or more atoms, not completely saturated, which are so linked that their union implies certain properties, and are conveniently regarded as playing the part of a single atom; a residue; -- called also a compound radical. Cf. Residue..

Methenyl :: Methenyl (n.) The hypothetical hydrocarbon radical CH, regarded as an essential residue of certain organic compounds..

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