petrosal
adjective
pe·tro·sal pə-ˈtrō-səl 
: of, relating to, or situated in the region of the petrous portion of the temporal bone or capsule of the inner ear
Word History
Etymology
Latin petrōsus "rocky, stony" (in New Latin os petrōsum, apophysis petrōsa, names for the petrous portion of the temporal bones) + -al entry 1 — more at petrous
First Known Use
1713, in the meaning defined above
Medical Definition
petrosal 1 of 2
adjective
pe·tro·sal pə-ˈtrō-səl
: of, relating to, or situated in the region of the petrous portion of the temporal bone or capsule of the inner ear
petrosal
2 of 2noun
: petrosal bone