petrosal

Etymology
From.

Adjective

 * 1) Of great hardness; petrous.
 * 2)  Of, pertaining to, or located near the petrous part of the temporal bone or the capsule of the inner ear.

Translations

 * Chinese:
 * Mandarin:

Noun

 * 1)  The petrous part of the temporal bone at the base of the skull, surrounding the inner ear.
 * 2)  The auditory capsule.