Library / English Dictionary

    SILURIAN PERIOD

    Pronunciation (US): Play  (GB): Play

     I. (noun) 

    Sense 1

    Meaning:

    From 425 million to 405 million years ago; first air-breathing animalsplay

    Synonyms:

    Silurian; Silurian period

    Classified under:

    Nouns denoting time and temporal relations

    Instance hypernyms:

    geological period; period (a unit of geological time during which a system of rocks formed)

    Holonyms ("Silurian period" is a part of...):

    Paleozoic; Paleozoic era (from 544 million to about 230 million years ago)

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