Triassic
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Related to Triassic: Permian
Tri·as·sic
(trī-ăs′ĭk)adj.
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.
n.
The Triassic Period.
[Late Latin trias, triad (from the subdivision of this period into three parts); see triad + -ic.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Triassic
(traɪˈæsɪk)adj
(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
n
(Geological Science) the Triassic Trias the Triassic period or rock system
[C19: from Latin trias triad, with reference to the three subdivisions]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Tri•as•sic
(traɪˈæs ɪk)adj.
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.
[1835–45; Trias the three-part series of strata characterizing the period (< German < Greek triás; see triad) + -ic]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Tri·as·sic
(trī-ăs′ĭk) 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.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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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 |
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Triassic - from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity