English definition of Radical

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Definition of radical

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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..

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Thionyl :: Thionyl (n.) The hypothetical radical SO, regarded as an essential constituent of certain sulphurous compounds; as, thionyl chloride..

Stythe :: Styryl (n.) A hypothetical radical found in certain derivatives of styrolene and cinnamic acid; -- called also cinnyl, or cinnamyl..

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..

Equivalent :: Equivalent (n.) A combining unit, whether an atom, a radical, or a molecule; as, in acid salt two or more equivalents of acid unite with one or more equivalents of base..

Menthyl :: Menthyl (n.) A compound radical forming the base of menthol.

Tribasic :: Tribasic (a.) Capable of neutralizing three molecules of a monacid base, or their equivalent; having three hydrogen atoms capable of replacement by basic elements on radicals; -- said of certain acids; thus, citric acid is a tribasic acid..

Valeryl :: Valeryl (n.) The hypothetical radical C5H9O, regarded as the essential nucleus of certain valeric acid derivatives..

Xylylene :: Xylylene (n.) Any one of three metameric radicals, CH2.C6H4.CH2, derived respectively from the three xylenes. Often used adjectively; as, xylylene alcohol..

Carbonyl :: Carbonyl (n.) The radical (CO)'', occuring, always combined, in many compounds, as the aldehydes, the ketones, urea, carbonyl chloride, etc..

Ambreate :: Ambreate (n.) A salt formed by the combination of ambreic acid with a base or positive radical.

Dimethyl :: Dimethyl (n.) Ethane; -- sometimes so called because regarded as consisting of two methyl radicals. See Ethane.

Formative :: Formative (a.) Serving to form; derivative; not radical; as, a termination merely formative..

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

Seminal :: Seminal (a.) Contained in seed; holding the relation of seed, source, or first principle; holding the first place in a series of developed results or consequents; germinal; radical; primary; original; as, seminal principles of generation; seminal virtue..

Sulphydrate :: Sulphuryl (n.) The hypothetical radical SO2; -- called also sulphon.

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

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..

Ether :: Ether (n.) Any similar oxide of hydrocarbon radicals; as, amyl ether; valeric ether..

Benzoyl :: Benzoyl (n.) A compound radical, C6H5.CO; the base of benzoic acid, of the oil of bitter almonds, and of an extensive series of compounds..

Fundamentally :: Fundamentally (adv.) Primarily; originally; essentially; radically; at the foundation; in origin or constituents.