portal vein

(mining) A sort of iron ore, found in loose masses of a globular form, containing sparkling particles.

Quartz occurring as gangue in a vein.

(anatomy) A communicant vein between the great saphenous vein and the small saphenous vein.

(anatomy) Either of the veins of the vena cava

A vein accompanying an artery.

The caudal vein, typically of a rodent

(nonstandard) Alternative spelling of azygos vein

(anatomy) The deep middle cerebral vein. / (anatomy) The superficial middle cerebral vein.

(entomology) A vein running along the dorsum of the wing.