the Trias

Variant of Triassic

Triassic definition

Tri·as·sic (trī as′ik)

adjective

designating or of the first geologic period of the Mesozoic Era, characterized by the breakup of Pangea, the development of tall forests of cycads and conifers, and the presence of the first dinosaurs, turtles, frogs, and small mammals

Etymology: < Ger triassisch (< LL Trias (see triad: because divisible into three groups) + -isch, -ic

Triassic Idioms

the Triassic

the Triassic Period or its rocks
also the Trias the Tri′as (-əs)

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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