/koy'yooh kon", kah'-/ , n.
1. a member of a North American Indian people living in the Yukon River valley in west-central Alaska.
2. the Athabaskan language of the Koyukon. Also called Tena .
[ resp., after the Koyukuk and Yukon Rivers, of earlier Co-Youkon kuyukantsy (pl.), deriv. of Kuyukak the Koyukuk River kuiyuk ]