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(Science: anatomy) hard; stony; petrous; as, the petrosal bone; petrosal part of the temporal bone.
Of, pertaining to, or in the region of, the petrous, or petrosal, bone, or the corresponding part of the temporal bone.
(Science: anatomy) Petrosal bone, a bone corresponding to the petrous portion of the temporal bone of man; or one forming more or less of the periotic capsule.
(Science: anatomy) A petrosal bone.
The auditory capsule.