Mesozoic

Pronunciation

• Rhymes: -əʊɪk

Origin

- + zoic + -

Full definition of Mesozoic

Adjective

1. (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.

Proper noun

1. (geology) The Mesozoic era.