( of bone especially the temporal bone) resembling stone in hardness

Like stone; hard; stony; rocky; as, the petrous part of the temporal bone.

Same as Petrosal.

1. Of stony hardness. 2. Relating to the petrous portion of the temporal bone, petrosal.

Pertaining to stone; stony.

Like stone: hard.

Hard; stony.

Hard; stony; in anat., applied to the portion of the temporal bone in which the internal organs of hearing are situated.

Very hard or stony; a pyramidal portion of the temporal bone wedged in between sphenoid and occipital; also a ganglion on its lower border.

The internal ear or labyrinth lies in the petrous part of the temporal bone, its outer boundary being the inner wall of the middle ear. – Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. by Alexander Miles Alexis Thomson

With bone forceps or a fine saw, split open the petrous portion of the temporal bone and observe the cochlea and the semicircular canals. – Physiology and Hygiene for Secondary Schools by Francis M. Walters, A.M.

121 The inner projection of the temporal bone is known as the petrous process. – Physiology and Hygiene for Secondary Schools by Francis M. Walters, A.M.

G. Petrous part of the temporal bone. – Surgical Anatomy by Joseph Maclise

On its inner side is a small air chamber in the petrous portion of the temporal bone, called the cavity of the tympanum. – A Practical Physiology by Albert F. Blaisdell

In fractures passing across the petrous temporal, the nerve may be torn at the time of the injury, or may become pressed upon by a traumatic effusion or by callus later, but considering the frequency of these fractures it is comparatively seldom damaged. – Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. by Alexander Miles Alexis Thomson