SG Heritage Dictionary

Petrosal [Adjective] Webster's Dictionary 1913

1. Hard; stony; petrous; as, the petrosal bone; petrosal part of the temporal bone.

2. Of, pertaining to, or in the region of, the petrous, or petrosal, bone, or the corresponding part of the temporal bone.

Petrosal [Noun] Webster's Dictionary 1913

1. A petrosal bone.