Mesozoic Definition
mĕzə-zōĭk, mĕs-
adjective
Designating or of the middle geologic era of the Phanerozoic Eon, subdivided into the Triassic, Jurassic, and Cretaceous periods and characterized by the development and extinction of the dinosaurs and the development of the first birds, mammals, and flowering plants.
Webster's New World
noun
The Mesozoic Era.
American Heritage
Synonyms:
- Age of Reptiles
- Mesozoic era
Idioms, Phrasal Verbs Related to Mesozoic
- the Mesozoic
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