archean

Noun archean has 1 sense

• archean(n = noun.time) archaeozoic, archaeozoic aeon, archean aeon, archean eon, 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
Derived form adjective archean₁

Adjective archean has 1 sense

• archean(s = adj.all) archaean - of or relating to the earliest known rocks formed during the Precambrian Eon;
Derived form noun archean₁