Pronunciation: (ō'tō), [key]
—pl. O•tos, (esp. collectively) O•to.
a member of a Siouan-speaking tribe of North American Indians who formerly inhabited the lower Missouri River basin and now live in Oklahoma. Also,Otoe.
a combining form meaning “ear,” used in the formation of compound words: otology. Also, esp. before a vowel,ot-.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.