Triassic
adjective
1.
noting or pertaining to a period of the Mesozoic Era, occurring from 230 to 190 million years ago and characterized by the advent of dinosaurs and coniferous forests.
noun
2.
Also, Trias
[trahy-uh s] /ˈtraɪ əs/ (Show IPA). the Triassic Period or System.
adjective
1.
of, denoting, or formed in the first period of the Mesozoic era that lasted for 42 million years and during which reptiles flourished
noun
2.
the Triassic, Trias, the Triassic period or rock system
Triassic
(trī-ās’ĭk)
The earliest period of the Mesozoic Era, from about 245 to 208 million years ago. During the early part of the Triassic Period the supercontinent Pangaea was located along the equator; by the end of the Triassic it had started to split up. Land life diversified in the Triassic in response to the mass extinctions of the end of the Paleozoic. Conifers, cycads, marine reptiles, dinosaurs, and the earliest mammals first appeared. See Chart at geologic time.
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