English dictionary



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English noun: Proterozoic eon

1. Proterozoic eon (time) from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms


SynonymsProterozoic, Proterozoic aeon


Instance hypernymaeon, eon


Part meronymPrecambrian, Precambrian aeon, Precambrian eon, Precambrian period









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