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Mesozoic

adj, name

Definitions

Adjective

1
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.

Adjective

1
of or relating to or denoting the Mesozoic era wordnet

Proper Noun

1
The Mesozoic era.
"The whole history of the earth is divided into five eras, with corresponding rock-systems. These are: 1. Archæan or Eozoic¹ era, embodied in the Laurentian system; 2. Palæozoic² era, embodied in the Palæozoic or Primary system; 3. Mesozoic³ era, recorded in the Secondary system; 4. Cenozoic,⁴ recorded in the Tertiary and Quaternary systems; and, 5. The Psychozoic era, or era of Mind, recorded in the recent system."

Etymology

Etymology 1

From meso- + -zoic.

Etymology 2

From meso- + -zoic.

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