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.
- Mastoid emissary vein
mastoid emissary vein n. A vein that connects the sigmoid sinus with the occipital vein or with one of the tributaries of the outer jugular vein by way of the mastoid foramen.