Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun archean_aeon

1 sense of archean aeon

Sense 1
Archean, Archean eon, Archean aeon, Archeozoic, Archaeozoic, Archeozoic eon, Archaeozoic aeon -- (the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life)
       INSTANCE OF=> eon, aeon -- (the longest division of geological time)