Dictionary.net

Infra-orbitar A., proceeds from the internal maxillary, from which it separates near the anterior and superior part of the zygomatic fossa. It enters the infra-orbitar canal, and passes through it, giving branches to the anterior and superior dental canal; issues by the foramen infra-orbitarium; and divides, in the fossa canina, into a number of branches, which lose themselves in the neighbouring parts. The infra-orbitar vein follows the same course.