Paleozoic

[,pæli:əu'zəuik;-,pei-]

Definition

(noun.) from 544 million to about 230 million years ago.

(adj.) of or relating to or denoting the Paleozoic era .

Editor: Robert--From WordNet

Definition

(a.) 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.

Inputed by Cecile