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Precambrian eon
DEFINITIONS OF:
Precambrian eon
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 period
Example of:
aeon
,
eon
the longest division of geological time
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