Synonyms & Definition of Pre-cambrian
From WordNet 2.0 :
Precambrian
(noun)
1: the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago [syn:
Precambrian
,
Precambrian
eon
,
Precambrian aeon
,
Precambrian period
]
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