mastoidal adj 1: relating to or resembling a nipple [syn: {mastoid}, {mastoidal}] n 1: process of the temporal bone behind the ear at the base of the skull [syn: {mastoid}, {mastoid process}, {mastoid bone}, {mastoidal}]
Mastoidal \Mas*toid"al\, a. Same as {Mastoid}. [1913 Webster]