(anatomy) Either of two veins, of which one is formed on each side of the body by the union of the external and internal iliac veins, and which unite to form the inferior vena cava at the level of the fifth lumbar vertebra.

(pathology) A potentially fatal condition in which one or more thrombi (or clots) form in the predominantly the leg or, more unusually, the arm. The clot may break free from the venous wall and travel via the circulatory system to the heart or to the lungs (causing a pulmonary embolism); this condition is often caused by keeping the legs bent for long periods but can also be caused by other medical problems.

bloody dock, Rumex sanguineus

plural of red-veined dock

(anatomy) a relatively large vein of the superficial posterior leg.

(anatomy) The large subcutaneous superficial vein of the leg and thigh.

Synonym of great saphenous vein

(anatomy) Synonym of small saphenous vein

plural of ball vein

plural of saddle vein