noun, plural O·tos, (especially 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.
a combining form meaning “ear,” used in the formation of compound words: otology.
Also especially before a vowel
Origin of oto-
< Greek ōto-,
combining form of oûs ear1
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for oto
Historical Examples of oto
Swim (v), ni̍huan (an French); same word as in the Oto language.
Mr. Bodmer took the portraits of an Omaha and an Oto Indian.
Near the mouth of Gasconade River we met the Oto steam-boat.
Oto touched his cap and adjusted the sighting apparatus to his shoulder.
Thus far Oto's old friend had seemed to bear a charmed life.
British Dictionary definitions for oto
indicating the earotitis; otolith
Word Origin for oto-
from Greek ous, ōt- ear
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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