Jump To:

• Oto
  Oto

  noun

  a member of a Siouan-speaking tribe of North American Indians who formerly inhabited the lower Missouri River basin and now live in Oklahoma.
• oto-
  oto-

  a combining form meaning “ear,” used in the formation of compound words.

Oto

¹ American  

[oh-toh] / ˈoʊ toʊ /

Or Otoe

noun

Otos, plural Oto plural

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.

---

oto- ² American  

1. a combining form meaning “ear,” used in the formation of compound words.

   otology.

---

oto- British  

combining form

1. indicating the ear

   otitis

   otolith

---

Usage

What does oto- mean? Oto- is a combining form used like a prefix meaning “ear.” It is often used in medical terms, especially in anatomy and pathology. Oto- comes from the Greek oûs, meaning “ear.” Related to the Greek oûs is English’s own word ear; so is the Latin word for ear, auris, which is the ultimate source of such words as aural. Learn more about oûs at our entry for otic, an adjective used in anatomy meaning “of or relating to the ear.”What are variants of oto-?When combined with words or word elements that begin with a vowel, oto- becomes ot-, as in otitis.

Other Word Forms

Inflected Forms

noun

• Oto
  plural
• Otos
  plural

Etymology

Origin of oto-

< Greek ōto-, combining form of oûs ear ¹