English dictionary



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English adjective: archean

1. archean of or relating to the earliest known rocks formed during the Precambrian Eon


Synonymsarchaean


Similarearly


Domain categorygeology


Antonymslate, middle


English noun: Archean

1. Archean (time) the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life


SynonymsArchaeozoic, Archaeozoic aeon, Archean aeon, Archean eon, Archeozoic, Archeozoic eon


Instance hypernymaeon, eon


Part meronymPrecambrian, Precambrian aeon, Precambrian eon, Precambrian period









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