Meaning of prehuman

pre•hu•man

Pronunciation: (prē-hy'mun or, often, -y'-), [key]
— adj.
  1. preceding the appearance or existence of human beings: the prehuman ages.
  2. of or pertaining to a human prototype.
—n.
  1. a prehuman animal.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.