saphenous vein

noun Anatomy.
either of two large veins near the surface of the foot, leg, and thigh, one on the inner side and the other on the outer and posterior sides.

Origin:
1830–40

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
saphenous vein   (sə-fē'nəs)  Pronunciation Key 
Either of two main superficial veins of the leg, one larger than the other, that begin at the foot. A portion of the larger saphenous vein is often used in surgery for coronary artery bypass graft.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Your doctor may use a vein, called the saphenous vein, from your leg.
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