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ules of a monobasic acid or the equivalent; having three hydrogen atoms which may be acid radicals; -- said of certain bases; thus, glycerin is a triacid base.

An element or radical whose valence is three. Triads of the Welsh bards, poetical histories, in which the facts recorded are grouped by threes, three things or circumstances of a kind being mentioned together. -- Hindoo triad. See Trimurti.

Having three atoms; -- said of certain elements or radicals.

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.

A glyceride formed by the replacement of three hydrogen atoms in glycerin by acid radicals.

h is equal to 3. -- Triple salt (Chem.), a salt containing three distinct basic atoms as radicals; thus, microcosmic salt is a triple salt. -- Triple star (Astron.), a system of three stars in close proximity. -- Triple time (Mus.), that time in which each measure is divided into three equal parts. -- Triple valve,…

th, substituted for, or compared with, three atoms of hydrogen; -- said of triad atoms or radicals; thus, nitrogen is trivalent in ammonia.

One who advocates extreme measures; an ultraist; an extremist; a radical. Brougham.

ght, or proper; as, ultraconservative; ultrademocratic, ultradespotic, ultraliberal, ultraradical, etc.

The principles of those who advocate extreme measures, as radical reform, and the like. Dr. H. More.

One who pushes a principle or measure to extremes; an extremist; a radical; an ultra.

ot.), an American perennial herb (Dyphylleia cymosa), having very large peltate and lobed radical leaves. -- Umbrella shell. (Zoöl.) See Umbrella, 3. -- Umbrella tree (Bot.), a kind of magnolia (M. Umbrella) with the large leaves arranged in umbrellalike clusters at the ends of the branches. It is a native of Pennsyl…

The radical regarded as characteristic of undecylic acid.

of being substituted for, one atom of hydrogen; monovalent; -- said of certain atoms and radicals.

Unsymmetrical carbon atom (Chem.), one which is united at once to four different atoms or radicals. This condition usually occasions physical isomerism, with the attendant action on polarized light.

The radical UO2, conveniently regarded as a residue of many uranium compounds.

The degree of combining power of an atom (or radical) as shown by the number of atoms of hydrogen (or of other monads, as chlorine, sodium, etc.) with which it will combine, or for which it can be substituted, or with which it can be compared; thus, an atom of hydrogen is a monad, and has a valence of one; the atoms of…

The hypothetical radical C5H9O, regarded as the essential nucleus of certain valeric acid derivatives.

The hypothetical radical VO, regarded as a characterized residue of certain vanadium compounds.

The hypothetical radical characteristic of vanillic alcohol.