ordovician ( synonym found)
Definition of ordovician:

°Of a geologic period within the Paleozoic era; comprises lower, middle and upper epochs from about 488 to 443 million years ago.
°The Ordovician period.
Definition of ordovician:

°Of a geologic period within the Paleozoic era; comprises lower, middle and upper epochs from about 488 to 443 million years ago.
°The Ordovician period.
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