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PALEOZOIC ERA
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
From 544 million to about 230 million years ago
Synonyms:
Paleozoic; Paleozoic era
Classified under:
Nouns denoting time and temporal relations
Instance hypernyms:
era; geological era (a major division of geological time; an era is usually divided into two or more periods)
Meronyms (parts of "Paleozoic era"):
Permian; Permian period (from 280 million to 230 million years ago; reptiles)
Carboniferous; Carboniferous period (from 345 million to 280 million years ago)
Age of Fishes; Devonian; Devonian period (from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites)
Silurian; Silurian period (from 425 million to 405 million years ago; first air-breathing animals)
Ordovician; Ordovician period (from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds)
Cambrian; Cambrian period (from 544 million to about 500 million years ago; marine invertebrates)
