Pronunciation: (kad'ō), [key]
—pl. -dos, (esp. collectively) -do for 1.
1. a member of any of several North American Indian tribes formerly located in Arkansas, Louisiana, and eastern Texas, and now living in Oklahoma.
2. the Caddoan language of the Caddo.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.