D defs.my
Entry 1 sense Webster, 1913

Mastoid

· Mas·toid · IPA /ˈmæ.stɔɪd/
01 a. Resembling the nipple or the breast; -- applied specifically to a process of the temporal bone behind the ear.
  1. 1.
    Resembling the nipple or the breast; -- applied specifically to a process of the temporal bone behind the ear.(Anat.)