Search Result for "paleozoic era":
Wordnet 3.0

NOUN (1)

1. from 544 million to about 230 million years ago;
[syn: Paleozoic, Paleozoic era]



WordNet (r) 3.0 (2006):

Paleozoic era
    n 1: from 544 million to about 230 million years ago [syn:
         Paleozoic, Paleozoic era]