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Từ điển Oxford Learners Wordfinder Dictionary
Archean
the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life • Syn: Archean eon, Archean aeon, Archeozoic, Archaeozoic, Archeozoic eon, Archaeozoic aeon • Derivationally related forms: archaeozoic (for: Archaeozoic), archeozoic (for: Archeozoic), archean • Instance Hypernyms: eon, aeon • Part Holonyms: Precambrian, Precambrian eon, Precambrian aeon, Precambrian period
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