Definitions of petrosal:
- adjective: Of great hardness; petrous.
- adjective: (anatomy, relational) Of, pertaining to, or located near the petrous part of the temporal bone or the capsule of the inner ear.
- noun: (anatomy) The petrous part of the temporal bone at the base of the skull, surrounding the inner ear.
- noun: (anatomy, zootomy) The auditory capsule.
(Definitions from Wiktionary)
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