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Cambrian

[kam-bree-uh n] /ˈkæm bri ən/
adjective
1.
Geology. noting or pertaining to a period of the Paleozoic Era, occurring from 570 million to 500 million years ago, when algae and marine invertebrates were the predominant form of life.
2.
of or pertaining to Cambria; Welsh.
noun
3.
Geology. the Cambrian Period or System.
4.
a native of Cambria; Welshman.
Origin
1580-1590
1580-90; < Medieval Latin Cambri(a) Wales, Latinization of MWelsh Cymry Wales, literally Welshmen (see Cymry) + -an
Related forms
post-Cambrian, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for Cambrian

Cambrian

/ˈkæmbrɪən/
adjective
1.
of, denoting, or formed in the first 65 million years of the Palaeozoic era, during which marine invertebrates, esp trilobites, flourished
2.
of or relating to Wales
noun
3.
the Cambrian, the Cambrian period or rock system
4.
a Welsh person
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
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Word Origin and History for Cambrian
adj.

1650s, "from or of Wales or the Welsh," from Cambria, variant of Cumbria, Latinized derivation of Cymry, the name of the Welsh for themselves, from Old Celtic Combroges "compatriots." Geological sense (of rocks first studied in Wales and Cumberland) is from 1836.

Online Etymology Dictionary, © 2010 Douglas Harper
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Cambrian in Science
Cambrian
  (kām'brē-ən, kām'-)   
The first period of the Paleozoic Era, from about 540 to 505 million years ago. During this time warm seas and desert land areas were widespread, and animal life diversified rapidly during what is known as the Cambrian Explosion. See Chart at geologic time.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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