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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..

Sporadically :: Sporadical (a.) Sporadic.

Pyridyl :: Pyridyl (n.) A hypothetical radical, C5H4N, regarded as the essential residue of pyridine, and analogous to phenyl..

Sesqui- :: Sesqui- () A combining form (also used adjectively) denoting that three atoms or equivalents of the substance to the name of which it is prefixed are combined with two of some other element or radical; as, sesquibromide, sesquicarbonate, sesquichloride, sesquioxide..

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-..

Decyl :: Decyl (n.) A hydrocarbon radical, C10H21, never existing alone, but regarded as the characteristic constituent of a number of compounds of the paraffin series..

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..

Base :: Base (n.) The positive, or non-acid component of a salt; a substance which, combined with an acid, neutralizes the latter and forms a salt; -- applied also to the hydroxides of the positive elements or radicals, and to certain organic bodies resembling them in their property of forming salts with acids..

Nitride :: Nitride (n.) A binary compound of nitrogen with a more metallic element or radical; as, boric nitride..

Hexad :: Hexad (n.) An atom whose valence is six, and which can be theoretically combined with, substituted for, or replaced by, six monad atoms or radicals; as, sulphur is a hexad in sulphuric acid. Also used as an adjective..

Tolyl :: Tolyl (n.) The hydrocarbon radical, CH3.C6H4, regarded as characteristic of certain compounds of the aromatic series related to toluene; as, tolyl carbinol..

Naphthyl :: Naphthyl (n.) A hydrocarbon radical regarded as the essential residue of naphthalene.

Nitrile :: Nitrile (n.) Any one of a series of cyanogen compounds; particularly, one of those cyanides of alcohol radicals which, by boiling with acids or alkalies, produce a carboxyl acid, with the elimination of the nitrogen as ammonia..

Butyl :: Butyl (n.) A compound radical, regarded as butane, less one atom of hydrogen..

Conservative :: Conservative (n.) One who, or that which, preserves from ruin, injury, innovation, or radical change; a preserver; a conserver..

Dibasic :: Dibasic (a.) Having two acid hydrogen atoms capable of replacement by basic atoms or radicals, in forming salts; bibasic; -- said of acids, as oxalic or sulphuric acids. Cf. Diacid, Bibasic..

Center :: Center (n.) Those members of a legislative assembly (as in France) who support the existing government. They sit in the middle of the legislative chamber, opposite the presiding officer, between the conservatives or monarchists, who sit on the right of the speaker, and the radicals or advanced republicans who occupy the seats on his left, See Right, and Left..

Acetyl :: Acetyl (n.) A complex, hypothetical radical, composed of two parts of carbon to three of hydrogen and one of oxygen. Its hydroxide is acetic acid..

Polyacid :: Polyacid (a.) Capable of neutralizing, or of combining with, several molecules of a monobasic acid; having more than one hydrogen atom capable of being replaced by acid radicals; -- said of certain bases; as, calcium hydrate and glycerin are polyacid bases..

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