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A compound radical, NH4, having the chemical relations of a strongly basic element like the alkali metals.

A genus of aromatic plants. It includes species which bear cardamoms, and grains of paradise.

sterior legs are usually turned upward and backward. The beach flea is an example. See Tetradecapoda and Arthrostraca.

A hydrocarbon radical, C5H11, of the paraffine series found in amyl alcohol or fusel oil, etc.

A compound of the radical amyl with oxygen and a positive atom or radical.

A gradual progression from one type to another, generally ascending. Huxley.

A meteor appearing to radiate from a point in the constellation Andromeda, -- whence the name.

Pertaining to, consisting of, or addicted to, anecdotes. "Anecdotical traditions." Bolingbroke.

A substance incapable of being electrified by friction. Faraday.

An oxide of a nonmetallic body or an organic radical, capable of forming an acid by uniting with the elements of water; -- so called because it may be formed from an acid by the abstraction of water.

amines. It may be regarded as ammonia in which one hydrogen atom has been replaced by the radical phenyl. It is a colorless, oily liquid, originally obtained from indigo by distillation, but now largely manufactured from coal tar or nitrobenzene as a base from which many brilliant dyes are made.

ch, in electro- chemical decompositions, is evolved at the anode; -- opposed to cation. Faraday.

The univalent radical, CH3OC6H4, of which anisol is the hydride.

used to render glass, iron, etc., less brittle, performed by allowing them to cool very gradually from a high heat.

To destroy or eradicate, as a property or attribute of a thing; to make of no effect; to destroy the force, etc., of; as, to annihilate an argument, law, rights, goodness.

A granular igneous rock composed almost exclusively of a soda- lime feldspar, usually labradorite.

An apparent motion of a planet toward the west; retrogradation.

ions, as distinguished by physical character, language, institutions, and customs, in contradistinction to ethnography, which treats historically of the origin and filiation of races and nations. P. Cyc.

A contradiction between any words or passages in an author. Sir W. Hamilton.

A contradicter. [Obs.]