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English definition of “mastoid”

mastoid

adjective     /ˈmæs.tɔɪd/ US  // specialized
relating to the mastoid process (= part of the skull just behind the ear ): Mastoidectomy is performed to remove infected air cells within the mastoid bone .The head and face
(Definition of mastoid adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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