Pronunciation: (pong'ku), [key]
—pl. -cas, (esp. collectively) -ca for 1.
1. a member of a North American Indian people formerly of northern Nebraska, now living mostly in northern Oklahoma.
2. the Siouan language of the Ponca, mutually intelligible with Omaha.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.