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[kam-bree-uh n] /ˈkæm bri ən/

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.
of or relating to ; Welsh.
Geology. the Cambrian Period or System.
a native of ; Welshman.
of, denoting, or formed in the first 65 million years of the Palaeozoic era, during which marine invertebrates, esp trilobites, flourished
of or relating to Wales
the Cambrian, the Cambrian period or rock system
a Welsh person

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.
(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.


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