a type of early hominid (Australopithecus boisei) who lived about 1,500,000 years ago in the Lower Pleistocene
See Zinjanthropus in American Heritage Dictionary 4
(zĭn-jănˈthrə-pəs, zĭnˌjăn-thrōˈpəs)
noun
An extinct primate postulated from bones found in Tanzania in 1959 and originally designated Zinjanthropus boisei by Louis S.B. Leakey. It was later shown to be an australopithecine and renamed Australopithecus boisei.