archean Meaning, Definition & Usage
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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
Archeozoic eon; Archean aeon; Archean eon; Archaeozoic aeon; Archaeozoic; Archeozoic.
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adjective satellite of or relating to the earliest known rocks formed during the Precambrian Eon
archaean.
