VDict - Definition of ordovician period

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ordovician period

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Noun

from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds

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Synonyms:
Ordovician Ordovician period

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Words contain "ordovician period" in its definition in English - English (Wordnet) dictionary:
ordovician period golden age time period period of time sinornis synchronic first trimester rhythm method of birth control calendar method more...

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