mastoid Meaning, Definition & Usage

  1. noun process of the temporal bone behind the ear at the base of the skull
    mastoid bone; mastoidal; mastoid process.
  2. adjective of or relating to or in the region of the mastoid process
  3. adjective relating to or resembling a nipple
    mastoidal.

WordNet

Mas"toid adjective
Etymology
Gr. the breast + form: cf. F. mastoïde.
Definitions
  1. (Anat.) (a) Resembling the nipple or the breast; -- applied specifically to a process of the temporal bone behind the ear. (b) Pertaining to, or in the region of, the mastoid process; mastoidal.

Webster 1913