Triassic(redirected from Triassic System)
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Of, relating to, or being the period of geologic time from about 251 to 200 million years ago, the oldest period of the Mesozoic Era. The Triassic Period is characterized by the presence of the supercontinent Pangaea, the diversification of land life, the rise of dinosaurs, and the appearance of the earliest mammals. See Table at geologic time.
The Triassic Period.
[Late Latin trias, triad (from the subdivision of this period into three parts); see triad + -ic.]
(Geological Science) of, denoting, or formed in the first period of the Mesozoic era that lasted for 42 million years and during which reptiles flourished
(Geological Science) the Triassic Trias the Triassic period or rock system
[C19: from Latin trias triad, with reference to the three subdivisions]
1. noting or pertaining to a period of the Mesozoic Era, occurring from 230 million to 190 million years ago and characterized by the advent of dinosaurs and coniferous forests.n.
2. Also, Tri•as (ˈtraɪ əs) the Triassic Period or System.
The earliest period of the Mesozoic Era, from about 245 to 208 million years ago. During the Triassic Period, land life diversified, dinosaurs arose, and the earliest mammals appeared. See Chart at geologic time.
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|Noun||1.||Triassic - from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity|
|Adj.||1.||Triassic - of or relating to or denoting the first period of the Mesozoic era|