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.
tympanic antrum
Words nearby mastoid antrum
monoscope,
monosemy,
monosepalous,
monoski,
monosodium,
mastoid antrum,
monosome,
monosomia,
monosomic,
monospaced type,
monospasm