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Definition of Varicose vein

Babylon English

enlarged veins in the legs
Varicose vein Definition from Language, Idioms & Slang Dictionaries & Glossaries
hEnglish - advanced version

varicose vein
n : a vein that is permanently dilated; most common in the legs

WordNet 2.0

Noun
1. a vein that is permanently dilated; most common in the legs
(hypernym) vein, vena, venous blood vessel
Varicose vein Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
Varicose veins are veins that have become enlarged and tortuous (twisted). The term commonly refers to the veins on the leg, although varicose veins can occur elsewhere. Veins have leaflet valves to prevent blood from flowing backwards (retrograde flow or reflux). Leg muscles pump the veins to return blood to the heart (the calf muscle pump mechanism), against the effects of gravity. When veins become varicose, the leaflets of the valves no longer meet properly, and the valves do not work (valvular incompetence). This allows blood to flow backwards and they enlarge even more. Varicose veins are most common in the superficial veins of the legs, which are subject to high pressure when standing. Besides being a cosmetic problem, varicose veins can be painful, especially when standing. Severe long-standing varicose veins can lead to leg swelling, venous eczema, skin thickening (lipodermatosclerosis) and ulceration. Life-threatening complications are uncommon, but varicose veins may be confused with deep vein thrombosis, which may be life-threatening.

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Varicose vein Definition from Medicine Dictionaries & Glossaries
NCI Dictionary of Cancer Terms
A condition in which a vein, most often in the legs, becomes permanently enlarged, twisted, and painful. This may be caused by valves in the vein that don't work properly or by weakness in the vein walls.
A Service of the National Cancer Institute.