Pā'le-o-zō'ic, a.

a. [Gr. παλαιός, ancient, and ζωόν, an animal, from ζωός, living, alive, and ζάειν, ζῆν, to live.] (Geol.) Pertaining, or belonging to, the older division of geological time, including the Silurian, Devonian, and Carboniferous ages, and also to the life or rocks of those ages. Dana.