"paleozoic" in the noun sense
1. Paleozoic, Paleozoic era
from 544 million to about 230 million years ago
"paleozoic" in the adjective sense
1. Paleozoic
of or relating to or denoting the Paleozoic era
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License