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Definition of Proterozoic aeon
1. Noun. From 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms.
Exact synonyms: Proterozoic, Proterozoic Eon
Group relationships: Precambrian, Precambrian Aeon, Precambrian Eon, Precambrian Period
Generic synonyms: Aeon, Eon
Derivative terms: Proterozoic
Group relationships: Precambrian, Precambrian Aeon, Precambrian Eon, Precambrian Period
Generic synonyms: Aeon, Eon
Derivative terms: Proterozoic