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mastoid

mas·toid [ máss tòyd ]


adjective 
Definition:
 
1. nipple-shaped: shaped like a nipple or breast

2. of mastoid process: relating to the mastoid process



noun  (plural mas·toids)
Definition:
 
anatomy 
Same as  mastoid process


[Mid-18th century. Via French mastoïde or modern Latin mastoides< Greek mastoeidēs< mastos "breast"]
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