petrous part of internal carotid artery

pet·rous part of in·ter·nal ca·rot·id ar·ter·y

[TA]
the part of the internal carotid artery in the carotid canal; its branches are carotidotympanic arteries and the artery of the pterygoid canal.

pet·rous part of in·ter·nal ca·rot·id ar·te·ry

(pet'rŭs pahrt in-tĕr'năl kă-rot'id ahr'tĕr-ē) [TA]
The part of the internal carotid artery in the carotid canal; its branches are the carotidotympanic arteries and the artery of the pterygoid canal.