Pronunciation: (krō-mag'nun, -non, -man'yun),[key] —n. 1. an Upper Paleolithic population of humans, regarded as the prototype of modern Homo sapiens in Europe. Skeletal remains found in an Aurignacian cave in southern France indicate that the Cro-Magnon had long heads, broad faces, and sunken eyes, and reached a height of approximately 5 ft. 9 in. (175 cm). See illus. under hominid. 2. a member of the Cro-Magnon population.