English noun: Archaeozoic aeon | |||
1. | Archaeozoic aeon (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 | ||
Synonyms | Archaeozoic, Archean, Archean aeon, Archean eon, Archeozoic, Archeozoic eon | ||
Instance hypernym | aeon, eon | ||
Part meronym | Precambrian, Precambrian aeon, Precambrian eon, Precambrian period | ||