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Definition of Archean eon
1. Noun. The time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life.
Exact synonyms: Archaeozoic, Archaeozoic Aeon, Archean, Archean Aeon, Archeozoic, Archeozoic Eon
Group relationships: Precambrian, Precambrian Aeon, Precambrian Eon, Precambrian Period
Generic synonyms: Aeon, Eon
Derivative terms: Archaeozoic, Archean, Archeozoic
Group relationships: Precambrian, Precambrian Aeon, Precambrian Eon, Precambrian Period
Generic synonyms: Aeon, Eon
Derivative terms: Archaeozoic, Archean, Archeozoic
Lexicographical Neighbors of Archean Eon
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