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Ordovician period

noun

1 Ordovician period

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

synonym: Ordovician.

is an instance of: geological period, period.

is a part of: Paleozoic, Paleozoic era.

Polish: ordowik

Find more on ordovician period elsewhere: etymology - rhymes - Wikipedia.

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