Webster's Revised Unabridged Dictionary -- Volume AB

Az"i·muth`al (?), a. Of or pertaining to the azimuth; in a horizontal circle.

-- Azimuthal error of a transit instrument, its deviation in azimuth from the plane of the meridian.

Az"o- (?). [See Azote.] (Chem.) A combining form of azote; (a) Applied loosely to compounds having nitrogen variously combined, as in cyanides, nitrates, etc. (b) Now especially applied to compounds containing a two atom nitrogen group uniting two hydrocarbon radicals, as in azobenzene, azobenzoic, etc. These compounds furnish many artificial dyes. See Diazo-.

Az`o·ben"zene (?), n. [Azo- + benzene.] (Chem.) A substance (C₆H₅.N₂.C₆H₅) derived from nitrobenzene, forming orange red crystals which are easily fusible.

A·zo"gue (?), n. [Sp. See Azoth.] Lit.: Quicksilver; hence: pl. (Mining) Silver ores suitable for treatment by amalgamation with mercury. [Sp. Amer.]

A·zo"ic (?), a. [Gr. α priv. + ? life, from ? to live.] Destitute of any vestige of organic life, or at least of animal life; anterior to the existence of animal life; formed when there was no animal life on the globe; as, the azoic. rocks.

-- Azoic age (Geol.), the age preceding the existence of animal life, or anterior to the paleozoic tome. Azoic is also used as a noun, age being understood. See Archæan, and Eozoic.

Az"ole (?), n. [From Azote.] (Org. Chem.) Any of a large class of compounds characterized by a five-membered ring which contains an atom of nitrogen and at least one other noncarbon atom (nitrogen, oxygen, sulphur). The prefixes furo-, thio, and pyrro- are used to distinguish three subclasses of azoles, which may be regarded as derived respectively from furfuran, thiophene, and pyrrol by replacement of the CH group by nitrogen; as, furo-monazole. Names exactly analogous to those for the azines are also used; as, oxazole, diazole, etc.

Az`o·le"ic (?), a. [Azo- + oleic.] (Chem.) Pertaining to an acid produced by treating oleic with nitric acid. [R.]

A·zon"ic (?), a. [Gr. ?; α priv. + ? zone, region.] Confined to no zone or region; not local.