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Benzal :: Benzal (n.) A compound radical, C6H5.CH, of the aromatic series, related to benzyl and benzoyl; -- used adjectively or in combination..

Boride :: Boride (n.) A binary compound of boron with a more positive or basic element or radical; -- formerly called boruret.

Ultra- :: Ultra- (a.) A prefix from the Latin ultra beyond (see Ulterior), having in composition the signification beyond, on the other side, chiefly when joined with words expressing relations of place; as, ultramarine, ultramontane, ultramundane, ultratropical, etc. In other relations it has the sense of excessively, exceedingly, beyond what is common, natural, right, or proper; as, ultraconservative; ultrademocratic, ultradespotic, ultraliberal, ultraradical, etc..

Diazo- :: Diazo- () A combining form (also used adjectively), meaning pertaining to, or derived from, a series of compounds containing a radical of two nitrogen atoms, united usually to an aromatic radical; as, diazo-benzene, C6H5.N2.OH..

Propidene :: Propidene (n.) The unsymmetrical hypothetical hydrocarbon radical, CH3.CH2.CH, analogous to ethylidene, and regarded as the type of certain derivatives of propane; -- called also propylidene..

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

Dicyanide :: Dicyanide (n.) A compound of a binary type containing two cyanogen groups or radicals; -- called also bicyanide.

Positive :: Positive (a.) Hence, basic; metallic; not acid; -- opposed to negative, and said of metals, bases, and basic radicals..

Phenylene :: Phenylene (n.) A hypothetic radical (C6H4) occurring in certain derivatives of benzene; as, phenylene diamine..

Trivalent :: Trivalent (a.) Having a valence of three; capable of being combined with, substituted for, or compared with, three atoms of hydrogen; -- said of triad atoms or radicals; thus, nitrogen is trivalent in ammonia..

Nitryl :: Nitryl (n.) A name sometimes given to the nitro group or radical.

Mesityl :: Mesityl (n.) A hypothetical radical formerly supposed to exist in mesityl oxide.

Revolution :: Revolution (n.) A total or radical change; as, a revolution in one's circumstances or way of living..

Radicality :: Radicality (n.) Radicalness; relation to a root in essential nature or principle.

Chartism :: Chartism (n.) The principles of a political party in England (1838-48), which contended for universal suffrage, the vote by ballot, annual parliaments, equal electoral districts, and other radical reforms, as set forth in a document called the People's Charter..

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

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..

Hydrosulphide :: Hydrosulphide (n.) One of a series of compounds, derived from hydrogen sulphide by the replacement of half its hydrogen by a base or basic radical; as, potassium hydrosulphide, KSH. The hydrosulphides are analogous to the hydrates and include the mercaptans..

Substitute :: Substituent (n.) Any atom, group, or radical substituted for another, or entering a molecule in place of some other part which is removed..

Tertiary :: Tertiary (a.) Possessing some quality in the third degree; having been subjected to the substitution of three atoms or radicals; as, a tertiary alcohol, amine, or salt. Cf. Primary, and Secondary..

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