Proterozoic

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Definition: Play

adj. Relating to or denoting the eon that constitutes the latter part of the Precambrian, between the Archean eon and the Phanerozoic eon, characterized by the appearance of the first stable continents and the first abundant fossils of living organisms.

Sentence: Play Play

The Proterozoic eon was marked by significant geological and biological changes.

Synonyms: Play

Precambrian; ancient; geological

Antonyms: Play

modern; recent; current

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