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Triassic

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.04 sec.
Tri·as·sic  (tr-sk)
adj.
Of or belonging to the geologic time, system of rocks, or sedimentary deposits of the first period of the Mesozoic Era, characterized by the diversification of land life, the rise of dinosaurs, and the appearance of the earliest mammals. See Table at geologic time.
n.
The Triassic Period or its system of deposits.

[Late Latin trias, triad (from the subdivision of this period into three parts); see triad + -ic.]

Triassic
Adjective
Geol of the period of geological time about 230 million years ago [Latin trias triad]

Triassic  (tr-sk)
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.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.TriassicTriassic - from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity
Age of Reptiles, Mesozoic, Mesozoic era - from 230 million to 63 million years ago
Adj.1.Triassic - of or relating to or denoting the first period of the Mesozoic era

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He may even now--if I may use the phrase--be wandering on some plesiosaurus-haunted Oolitic coral reef, or beside the lonely saline lakes of the Triassic Age.
A single glance at the thing was sufficient to assure me that I was facing one of those long-extinct, prehistoric creatures whose fossilized remains are found within the outer crust as far back as the Triassic formation, a gigantic labyrinthodon.
 
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