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Mesozoic

Syllabification: (Mes·o·zo·ic)

Definition of Mesozoic

adjective

Geology

of, relating to, or denoting the era between the Paleozoic and Cenozoic eras, comprising the Triassic, Jurassic, and Cretaceous periods.
(as noun the Mesozoic) the Mesozoic era or the system of rocks deposited during it.

The Mesozoic lasted from about 245 million to 65 million years ago. Large reptiles were dominant on land and sea throughout this time; vegetation had become abundant, and the first mammals, birds, and flowering plants appeared

Origin:

mid 19th century: from meso- 'intermediate' + Greek zōion 'animal' (referring to the appearance of the first mammals) + -ic

Mesozoic in other Oxford dictionaries

Definition of Mesozoic in the British & World English dictionary

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