Mesozoic

Mes·o·zo·ic  (mz-zk, ms-)

adj.

Of, belonging to, or designating the era of geologic time that includes the Triassic, Jurassic, and Cretaceous periods and is characterized by the development of flying reptiles, birds, and flowering plants and by the appearance and extinction of dinosaurs. See Table at geologic time.

n.

The Mesozoic Era.

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Mesozoic [mess-oh-zoh-ik]

Adjective

Geol of the geological era that began 225 million years ago and lasted about 155 million years, during which the dinosaurs emerged, flourished, then became extinct [Greek misos middle + zōion animal]

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Mesozoic  (mz-zk)

The era of geologic time from about 245 to 65 million years ago. The Mesozoic Era was characterized by a drastic change in plants and animals. In the early part of the Mesozoic, ferns, cycads, and ginkgos were dominant; later, gymnosperms and angiosperms developed. Dinosaurs also first appeared in the Mesozoic and, with the exception of birds, became extinct at the end of the era. See Chart at geologic time.

Thesaurus

Noun	1.	Mesozoic - from 230 million to 63 million years ago Age of Reptiles, Mesozoic era Cretaceous, Cretaceous period - from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants Jurassic, Jurassic period - from 190 million to 135 million years ago; dinosaurs; conifers Triassic, Triassic period - from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity
Adj.	1.	Mesozoic - of or relating to or denoting the Mesozoic era