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petrous
(redirected from Petrous portion)

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
petrous /pet·rous/ (pet´rus) resembling a rock; hard; stony.
pet·rous (ptrs)
adj.
1. Of stony hardness.
2. Of or relating to the dense hard portion of the temporal bone that forms a protective case for the inner ear.

petrous
[pet′rəs]
Etymology: L, petra, rock
resembling a rock or stone.

petrous [pet´rus]
resembling rock or stone; stony.

petrous
resembling rock or stone; stony.

petrous bone
the pars petrosa, or petrous portion of the temporal bone. See also Table 10.


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The jugular fossa, which is usually on the inferior surface of the petrous portion of the temporal bone, is a deep depression of variable size.
At the superior border of the thyroid cartilage, it ascends from the common carotid bifurcation superiorly to enter the carotid canal in the petrous portion of the temporal bone.
Fluid identified in the petrous portion or mastoid air cells, however, is a nonspecific finding and is often an incidental finding.
 
 
 
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