adj. Preceding the advent of modern humanity, Homo sapiens
n. One of the human-like creatures prior to Homo sapiens.
The Century Dictionary and Cyclopedia
Occurring or existing before the appearance of man upon the earth; pertaining to times antecedent to human existence.
Word Usage
"The Dancer is a "clever little prehuman statue," she learns, which was discovered on an uninhabited planet by the hapless crew of a space freighter and has been wreaking havoc ever since."