Triassic
Americanadjective
noun
adjective
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012noun
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012-
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.
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See Chart at geologic time
Other Word Forms
- post-Triassic adjective
Etymology
Origin of Triassic
1835–45; Trias the three-part series of strata characterizing the period (< German < Greek triás; triad ) + -ic
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The fossils uncovered in this study date back about 200 million years to the end of the Triassic Period, a time when what is now the United Kingdom was located in warmer, tropical latitudes.
From Science Daily
The species lived at the end of the Triassic period, during which the first dinosaurs and the ancestors of mammals started to appear, the researchers said.
From Barron's
"The bones of Triassic pterosaurs are small, thin, and often hollow, so they get destroyed before they get fossilised," explained Dr Kligman.
From BBC
The study focused on a previously underexplored region, Polish Basin, located in the Late Triassic time in the in the northern parts of the then supercontinent Pangea.
From Science Daily
The ancestors of dinosaurs were small omnivores, minor players in the Triassic ecosystem.
From Science Magazine
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.