a. 古生代的

n. 古生代

Paleozoic \Pa`le*o*zo"ic\, 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}.


Paleozoic \Pa`le*o*zo"ic\, n. (Geol.)
The Paleozoic time or strata.