Paleozoic

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Related to Palaezoic: Paleozoic era, Palaeozoic, Palæozoic

Paleozoic

[¦pāl·ē·ə¦zō·ik]
(geology)
The era of geologic time from the end of the Precambrian (600 million years before present) until the beginning of the Mesozoic era (225 million years before present).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.