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Oto

or O·toe

[oh-toh]
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noun, plural O·tos, (especially collectively) O·to.
  1. a member of a Siouan-speaking tribe of North American Indians who formerly inhabited the lower Missouri River basin and now live in Oklahoma.
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oto-

  1. a combining form meaning “ear,” used in the formation of compound words: otology.
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Also especially before a vowel, ot-.

Origin of oto-

< Greek ōto-, combining form of oûs ear1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for oto

oto-

before a vowel ot-

combining form
  1. indicating the earotitis; otolith
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Word Origin

from Greek ous, ōt- ear
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

oto in Medicine

oto-

pref.
  1. Ear:otology.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.