Pronunciation: (u-zō'ik, ā-), [key]
(formerly) noting or pertaining to the Precambrian Era, esp. that part formerly believed to precede the first appearance of life; Archean. Cf. Eozoic.
Pronunciation: (a-zō'ik), [key]
of, pertaining to, or characteristic of the azo group.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.