Definition of Jurassic

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< Jura Mountains

jurat >

Ju·ras·sic

-r

k) KEY

ADJECTIVE:

Of or belonging to the geologic time, rock series, or sedimentary deposits of the second period of the Mesozoic Era, in which dinosaurs continued to be the dominant land fauna and the earliest birds appeared. See Table at geologic time.

NOUN:

The Jurassic Period or its system of deposits.

ETYMOLOGY:
French jurassique, after the Jura (Mountains)

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