'Paleozoic' definitions:

Definition of 'Paleozoic'

adjective

Of or relating to or denoting the Paleozoic era

noun

From 544 million to about 230 million years ago [syn: Paleozoic, Paleozoic era]

From: GCIDE

Paleozoic \Pa`le*o*zo"ic\ (p[=a]`l[-e]*[-o]*z[=o]"[i^]k), a. [Paleo- + Gr. zwh` life, fr. zh^n to live.] (Geol.) Of or pertaining to, or designating, the older division of geological time during which life is known to have existed, including the Silurian, Devonian, and Carboniferous ages, and also to the life or rocks of those ages. See Chart of Geology. [1913 Webster]

From: GCIDE

Paleozoic \Pa`le*o*zo"ic\ (p[=a]`l[-e]*[-o]*z[=o]"[i^]k), n. (Geol.) The Paleozoic time or strata. [1913 Webster]