archean aeon is a noun meaning "the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life". It carries one recorded sense.
the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
Definitions, synonyms and semantic relations for archean aeon come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.