from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Anatomy A vein.

from the GNU version of the Collaborative International Dictionary of English

  • n. A vein.

from The Century Dictionary and Cyclopedia

  • n. In anatomy, a vein. See vein
  • n. The superior or descending vena cava returns the blood from the head and neck, the upper limbs, and the whole of the thorax. It is formed by the junction of the right and left innominate veins, behind the junction of the first costal cartilage of the right side with the sternum, and descends nearly vertically to empty into the right auricle of the heart. It receives the pericardial and mediastinal veins and the large azygous vein. In vertebrates at large the two venæ cavæ are distinguished as postcaval and precaval veins. See cuts under circulation, diaphragm, embryo, heart, lung, pancreas, and thorax.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a blood vessel that carries blood from the capillaries toward the heart


Middle English, from Latin vēna.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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