from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of or relating to a vein formed by the union of the superficial temporal and maxillary veins.
retro- + mandibular (Wiktionary)
Its antero-inferior surface is quadrilateral and slightly concave; it constitutes the posterior boundary of the mandibular fossa, and is in contact with the retromandibular part of the parotid gland.