Mesozoic

  1. Adjective.  (geology) Of a geologic era within the Phanerozoic eon that comprises the Triassic, Jurassic and Cretaceous periods from about 230 to 65 million years ago, when life on earth was dominated by reptiles.
  2. Proper noun.  (geology) The Mesozoic era.

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This entry was last updated on RefTopia from its source on 3/20/2012.