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Meaning of prehominid

pre•hom•i•nid

Pronunciation: (prē-hom'u-nid), [key]
— n.
  1. any of the extinct humanlike primates classified in the former family Prehominidae.
  2. any extinct form that is thought to be an ancestor of the hominids.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.