sphenoidal emissary foramen


sphe·noi·dal em·is·sar·y fo·ra·men

[TA] a minute inconstant foramen in the greater wing of the sphenoid bone, anterior and medial to the foramen ovale, transmitting a small emissary vein from the cavernous sinus. Synonym(s): foramen venosum [TA], venous foramen, Vesalius foramen