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Definition of Archean
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 Aeon, Archean Eon, Archeozoic, Archeozoic Eon
Group relationships: Precambrian, Precambrian Aeon, Precambrian Eon, Precambrian Period
Generic synonyms: Aeon, Eon
Derivative terms: Archaeozoic, Archeozoic
Group relationships: Precambrian, Precambrian Aeon, Precambrian Eon, Precambrian Period
Generic synonyms: Aeon, Eon
Derivative terms: Archaeozoic, Archeozoic
2. Adjective. Of or relating to the earliest known rocks formed during the Precambrian Eon.
Definition of Archean
1. archaean [n -CHAEA] - See also: archaean
Lexicographical Neighbors of Archean
Other Resources:
Breton