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Precambrian period

DEFINITIONS OF: Precambrian period

1

n the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago

Synonyms:
Precambrian, Precambrian aeon, Precambrian eon
Example of:
aeon, eon
the longest division of geological time
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