Jurassic

Meanings

1. 1
   adj

   relating to the second period of the Mesozoic Era, approximately 201 to 145 million years ago

   The quarry preserves Jurassic fossils of marine reptiles and ammonites.

2. 2
   noun

   the Jurassic period of geological time

   The first known birds appeared during the Jurassic.

Borrowed from French jurassique, formed from Jura, the European mountain range whose rock strata helped define the period, + -ic. The geological name was established in the nineteenth century.

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