English
Detailed Synonyms for Ordovician period in English
Ordovician period:
Ordovician period [the ~] nom
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the Ordovician period
– from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds 1the Ordovician; the Ordovician period– from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds 1