Silurian definition

Silurian

Topics Silurian Definition

WordNet

noun

(1) From 425 million to 405 million years ago; first air-breathing animals

WiktionaryText

Adjective

Of a geologic period within the Paleozoic era; comprises the Llandovery, Wenlock, Ludlow and Pridoli epochs from about 439 to 409 million years ago.

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