apex of petrous part of temporal bone

a·pex of pet·rous part of tem·po·ral bone

[TA]
the irregular anteromedial extremity of the petrous part on which the anterior end of the carotid canal opens.

a·pex of pet·rous part of tem·po·ral bone

(āpeks petrŭs pahrt tempŏr-ăl bōn) [TA]
The irregular anteromedial extremity of the petrous part on which the anterior end of the carotid canal opens.
Synonym(s): apex partis petrosae ossis temporalis.