Antherozooid :: Antherozooid (n.) One of the mobile male reproductive bodies in the antheridia of cryptogams.
Anthozoa :: Anthozoa (n. pl.) The class of the Coelenterata which includes the corals and sea anemones. The three principal groups or orders are Acyonaria, Actinaria, and Madreporaria..
Anthozoan :: Anthozoan (a.) Pertaining to the Anthozoa.
Anthozoic :: Anthozoic (a.) Of or pertaining to the Anthozoa.
Antozone :: Antozone (n.) A compound formerly supposed to be modification of oxygen, but now known to be hydrogen dioxide; -- so called because apparently antagonistic to ozone, converting it into ordinary oxygen..
Archaeozoic :: Archaeozoic (a.) Like or belonging to the earliest forms of animal life.
Azo- :: Azo- () Applied loosely to compounds having nitrogen variously combined, as in cyanides, nitrates, etc..
Azo- :: Azo- () 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-..
Azobenzene :: Azobenzene (n.) A substance (C6H5.N2.C6H5) derived from nitrobenzene, forming orange red crystals which are easily fusible..
Azoic :: Azoic (a.) 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..