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mastoid

American  
[mas-toid] / ˈmæs tɔɪd /

adjective

Anatomy.
  1. of or relating to the mastoid process.

  2. resembling a breast or nipple.


noun

  1. the mastoid process.

mastoid British  
/ ˈmæstɔɪd /

adjective

  1. shaped like a nipple or breast

  2. designating or relating to a nipple-like process of the temporal bone behind the 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

noun

  1. the mastoid process

  2. informal mastoiditis

"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

Other Word Forms

  • intermastoid adjective
  • postmastoid adjective

Etymology

Origin of mastoid

1725–35; < New Latin mastoīdēs < Greek mastoeidḗs. See masto-, -oid

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In part, the look of those “big eyes” was informed by a mastoid operation that permanently damaged Ms. Keane’s hearing when she was 2.

From Washington Post • Jun. 29, 2022

From childhood, when a mastoid operation resulted in permanent eardrum damage and hearing loss, she had been fascinated with eyes, watching for cues to amplify what was being said.

From New York Times • Jun. 28, 2022

From the mastoid they created a 2-millimeter opening — roughly the width of a spaghetti noodle — into the middle ear.

From Salon • Jan. 17, 2022

He was about to dress and find some breakfast when the alert embedded in his mastoid bone buzzed three times; it was someone in the Project attempting to get in touch with him.

From Slate • Jan. 30, 2021

So far, aside from one scare—at five, Milton had nearly died from a mastoid infection— they had both been healthy.

From "Middlesex: A Novel" by Jeffrey Eugenides