archean eon

Noun archean eon has 1 sense

• archean eon(n = noun.time) archaeozoic, archaeozoic aeon, archean, archean aeon, archeozoic, archeozoic eon - the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life;
is a part of precambrian, precambrian aeon, precambrian eon, precambrian period
is a kind of aeon, eon