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Definition 2024
Proterozoic
Proterozoic
English
Proper noun
Proterozoic
- (geology) The eon from 2,500 Ma to 541.0±1.0 Ma, the beginning of the Phanerozoic, marked by the build up of oxygen in the atmosphere and the emergence of primitive multicellular life.
Hypernyms
- (eon 2,500-541 Ma): Precambrian - eon/supereon
Hypernyms
- (eon 2,500-541 Ma): Paleoproterozoic, Mesoproterozoic, Neoproterozoic
Coordinate terms
Translations
eon 2,500-541 Ma
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Adjective
Proterozoic (not comparable)
Translations
of eon from 2,500 to 541 million years ago
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See also
- Appendix:Geologic timescale