Found 1 items, similar to Archean eon.
English → English (WordNet) Definition: Archean eon Archean eon n : 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, Archean aeon, Archeozoic, Archaeozoic, Archeozoic eon, Archaeozoic aeon]