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

ignating, certain acids analogous to the phosphonic acids, but containing two hydrocarbon radicals, and derived from the secondary phosphines by oxidation.

ning to, or designating, certain derivatives of phosphorous acid containing a hydrocarbon radical, and analogous to the sulphonic acid.

The hypothetical radical PH4, analogous to ammonium, and regarded as the nucleus of certain derivatives of phosphine.

The radical PO, regarded as the typical nucleus of certain compounds.

The hypothetical radical of phthalic acid.

The hypothetical radical of picric acid, analogous to phenyl.

pitcher plant, the Cephalotus follicularis, a low saxifragaceous herb having two kinds of radical leaves, some oblanceolate and entire, others transformed into little ovoid pitchers, longitudinally triple-winged and ciliated, the mouth covered with a lid shaped like a cockleshell. -- California pitcher plant, the Darl…

plant of the genus Plantago, but especially the P. major, a low herb with broad spreading radical leaves, and slender spikes of minute flowers. It is a native of Europe, but now found near the abode of civilized man in nearly all parts of the world. Indian plantain. (Bot.) See under Indian. -- Mud plantain, a homely N…

A double chloride of platinum and some other metal or radical; a salt of platinochloric acid.

A double cyanide of platinum and some other metal or radical; a salt of platinocyanic acid.

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.

cules of a monacid base; having several hydrogen atoms capable of being replaced by basic radicals; -- said of certain acids; as, sulphuric acid is polybasic.

Containing several tungsten atoms or radicals; as, polytungstic acid. Polytungstic acid (Chem.), any one of several complex acids of tungsten containing more than one atom of tungsten.

, basic; metallic; not acid; -- opposed to negative, and said of metals, bases, and basic radicals. Positive crystals (Opt.), a doubly refracting crystal in which the index of refraction for the extraordinary ray is greater than for the ordinary ray, and the former is refracted nearer to the axis than the latter, as qu…

The radical KO, derived from, and supposed to exist in, potassium hydroxide and other compounds.

r a derivative of ammonia in which only one atom of hydrogen has been replaced by a basic radical; -- distinguished from secondary and tertiary amines. -- Primary amputation (Surg.), an amputation for injury performed as soon as the shock due to the injury has passed away, and before symptoms of inflammation supervene…

Original; primary; radical; not derived; as, primitive verb in grammar. Primitive axes of coördinate (Geom.), that system of axes to which the points of a magnitude are first referred, with reference to a second set or system, to which they are afterward referred. -- Primitive chord (Mus.), that chord, the lowest note…

A hypothetical hydrocarbon radical, C3H5, isomeric with allyl and glyceryl, and regarded as the essential residue of glycerin. Cf. Allyl, and Glyceryl.

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