Library / English Dictionary

    PALEOZOIC ERA

    Pronunciation (US): Play  (GB): Play

     I. (noun) 

    Sense 1

    Meaning:

    From 544 million to about 230 million years agoplay

    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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