archaeozoic, Ar·chæ·o·zo·ic a. Zool. Like or belonging to the earliest forms of animal life.
adj : formed in the earlier of two divisions of the Precambrian
era; "archeozoic life forms" [syn: archeozoic]
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 eon, Archean
aeon, Archeozoic, Archeozoic eon, Archaeozoic aeon]