Precambrian aeon

pre·camb·ria·naeon

uncommon

noun

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

Synonyms

prearrangement preassemble prebend prebendary Precambrian Precambrian eon Precambrian period precancerous precarious precariously

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