Paleozoic era (original) (raw)

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)

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