Pronunciation: (rō-bus'tus), [key]
1. an extinct species of large-toothed bipedal hominid that lived in southern Africa c1.5–2 million years ago: formerly classified as the genus Paranthropus.
2. a fossil belonging to this species. See illus. under hominid.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.