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Noun precambrian eon has 1 sense
- Precambrian, Precambrian eon, Precambrian aeon, Precambrian period - the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago
--1 is a kind of eon, aeon
--1 has parts:
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