Precambrian Meaning in the Cambridge English Dictionary
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Meaning of “Precambrian” in the English Dictionary

"Precambrian" in British English

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Precambrianadjective

uk   us   /ˌpriːˈkæm.bri.ən/ specialized
from or referring to the ​earliestperiod of ​time, between about 4,600 and 543 million ​years ago, from when the ​earth was ​formed until the first ​simpleforms of ​lifeappeared: Precambrian ​time Precambrian ​rocks
the Precambrian
noun [S] uk   us  
the Precambrian ​period of ​time
(Definition of Precambrian from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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