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mastoidal

Definitions of mastoidal
  1. noun
    process of the temporal bone behind the ear at the base of the skull
    synonyms: mastoid, mastoid bone, mastoid process
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    type of:
    appendage, outgrowth, process
    a natural prolongation or projection from a part of an organism either animal or plant
  2. adjective
    relating to or resembling a nipple
    synonyms: mastoid
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