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A hydrocarbon radical regarded as an essential residue of propine and allied compounds.

The hypothetical radical C3H5O, regarded as the essential residue of propionic acid and certain related compounds.

The hypothetical radical C3H7, regarded as the essential residue of propane and related compounds.

A hypothetical radical, C5H4N, regarded as the essential residue of pyridine, and analogous to phenyl.

eplaced by, or compared with, four monad atoms; tetravalent; -- said of certain atoms and radicals; thus, carbon and silicon are quadrivalent elements.

A hypothetical radical of quinine and related alkaloids.

The hypothetical radical of certain quinone derivatives related to rhodizonic acid.

A radical of which quinone is the hydride, analogous to phenyl. [Written also kinoyl.]

A primitive, from which spring other words; a radical; a root; an etymon.

zon, 2 (b). -- Rational quantity (Alg. ), one that can be expressed without the use of a radical sign, or in extract parts of unity; -- opposed to irrational or radical quantity. -- Rational symptom (Med.), one elicited by the statements of the patient himself and not as the result of a physical examination.…

To render rational; to free from radical signs or quantities.

ss; as, red-hot iron; red-hot balls. Hence, figuratively, excited; violent; as, a red-hot radical. Shak.

Hence, to make a radical change for the better in the character or condition of; as, to regenerate society.

of being exchanged (for); as, the hydrogen of acids is replaceable by metals or by basic radicals.

ce, an atom or group regarded as a portion of a molecule; -- used as nearly equivalent to radical, but in a more general sense.

A total or radical change; as, a revolution in one's circumstances or way of living. The ability . . . of the great philosopher speedily produced a complete revolution throughout the department. Macaulay.

arliest terms employed in language; a word from which other words are formed; a radix, or radical.

The hypothetical radical of salicylic acid and of certain related compounds.

replaceable hydrogen atoms which are only partially exchanged for metallic atoms or basic radicals; as, acid potassium sulphate is an acid salt. (b) A salt, whatever its constitution, which merely gives an acid reaction; thus, copper sulphate, which is composed of a strong acid united with a weak base, is an acid salt…

Hence, an extreme or radical republican; a violent revolutionist; a Jacobin.