Definition of mastoid in English:


Syllabification: mas·toid
Pronunciation: /ˈmasˌtoid


  • Of or relating to the mastoid process: mastoid disease
    More example sentences
    • The relationship between middle ear disease and mastoid development remains unclear although it is known that poor mastoid development is associated with middle ear disease.
    • Cholesterol granuloma is usually associated with chronic middle ear disease and is common in the mastoid antrum and air cells of the temporal bone.
    • Common to all of these patients is an abnormal connection between the sterile subarachnoid space, and the sinonasal region, middle ear cleft and mastoid cavity.


Anatomy Back to top  
  • 1The mastoid process.
    More example sentences
    • Longstanding cholesteatomas expand to involve the mastoid, inner ear, and facial nerve.
    • They were implanted in the mastoid, frontal and maxillary regions for periods of 1 week to 2 months.
    • The group of patients underwent modified radical mastoidectomy because of the presence of a sclerotic mastoid with extensive cholesteatoma.
  • 1.1 (mastoids) [treated as singular] informal Mastoiditis.


mid 18th century: via French and modern Latin from Greek mastoeidēs 'breast-shaped', from mastos 'breast'.

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