Emissary sphenoidal foramen

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Emissary sphenoidal foramen --> foramen venosum

(Science: anatomy) 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: emissary sphenoidal foramen, venous foramen, Vesalius' foramen.