ordovician period

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Definitions from WordNet

Noun ordovician period has 1 sense

Ordovician, Ordovician period - from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds
--₁ is a kind of period, geological period
--₁ is a part of Paleozoic, Paleozoic era

Definitions from the Web

Term: Ordovician Period

Description: The Ordovician Period refers to the second geological period of the Paleozoic Era, lasting from about 485 to 443 million years ago. It is characterized by the diversification and proliferation of marine life, particularly the rise of several marine invertebrate groups.

Sample sentences:

The Ordovician Period witnessed the emergence and spread of a great variety of marine species.
Fossils from the Ordovician Period provide valuable insights into the ancient marine ecosystem.
During the Ordovician Period, the first recognizable coral reef communities appeared.

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