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1. (adj.) Paleozoic
noting or pertaining to a geologic era occurring between 570 million and 230 million years ago, when fish, insects, and reptiles first appeared.
2. (n.) Paleozoic
the Paleozoic Era or group of systems.
Etymology: (1830–40; paleo - + -zoic)
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| Definition of 'paleozoic' |
Princeton's WordNet |
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1. (adj) Paleozoic, Paleozoic era
from 544 million to about 230 million years ago
2. (adj) Paleozoic
of or relating to or denoting the Paleozoic era
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| Definition of 'paleozoic' |
Webster Dictionary |
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1. (adj) paleozoic
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
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Definitions of paleozoic 
