adjective Geology.

(formerly) noting or pertaining to the Precambrian Era, especially the period including the beginnings of animal life.

Origin of Eozoic

First recorded in 1875–80; eo- + zo- + -ic
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Examples from the Web for eozoic

Historical Examples of eozoic

British Dictionary definitions for eozoic



archaic of or formed in the part of the Precambrian era, during which life first appeared
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012