Definitions for "Mastoid"
Keywords:  temporal, eidos, skull, ear, bone
Resembling the nipple or the breast; -- applied specifically to a process of the temporal bone behind the ear.
back portion of the temporal bone (in the skull)
A bone composed of a series of air filled cells located behind the middle ear cavity.
Keywords:  nipple, resembling, relating
relating to or resembling a nipple
Keywords:  pertaining, region, process
Pertaining to, or in the region of, the mastoid process; mastoidal.