Petrohyoid
Pronunciation : Pet`ro*hy"oid
Part of Speech : a.
Etymology : [Petro + hyoid.] (Anat.)
Definition : Defn: Pertaining to petrous, oe periotic, portion of the skull and the hyoid arch; as, the petrohyoid muscles of the frog.
Source : Webster's Unabridged Dictionary, 1913