[mas-toid] /ˈmæs tɔɪd/
of or relating to the .
resembling a breast or nipple.
shaped like a nipple or breast
designating or relating to a nipple-like process of the temporal bone behind the ear
the mastoid process
“breast-shaped, resembling a breast or nipple,” 1732, from Greek mastoeides “resembling a breast,” from mastos “(woman’s) breast” (see masto-) + -oeides “like,” from eidos “form, shape” (see -oid). As a noun, 1800, from the adjective.
mastoid mas·toid (mās’toid’)
The mastoid process. adj.
- Mastoid antrum
mastoid antrum n. A cavity in the petrous portion of the temporal bone that communicates with the mastoid sinuses and epitympanic recess of the middle ear. Also called tympanic antrum.
- Mastoid canaliculus
mastoid canaliculus n. The canal that extends from the jugular fossa through the mastoid process and transmits the auricular branch of the vagus nerve.
- Mastoid cell
mastoid cell n. See mastoid sinus.
[mas-toi-dek-tuh-mee] /ˌmæs tɔɪˈdɛk tə mi/ noun, plural mastoidectomies. Surgery. 1. the removal of part of a , usually for draining an infection. /ˌmæstɔɪˈdɛktəmɪ/ noun (pl) -mies 1. surgical removal of the mastoid process mastoidectomy mas·toid·ec·to·my (mās’toi-děk’tə-mē) n. Surgical removal of mastoid sinuses or part or all of the mastoid process.