from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An extinct species of humans considered to be an ancestor of modern humans and the earliest hominid to make tools. This species existed between 1.5 and 2.0 million years ago.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. a taxonomic species, within genus Homo - "Handy man" (extinct)
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. extinct species of upright East African hominid having some advanced humanlike characteristics
Homo ergaster/erectus, of which we have many fossil specimens, is a very persuasive halfway link, no longer missing, between Homo sapiens today and Homo habilis two million years ago, which is in turn a beautiful link back to Australopithecus three million years ago, which, as we saw, could pretty well be described as an upright-walking chimpanzee.