blood vessel

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An elastic tubular channel, such as an artery, a vein, or a capillary, through which the blood circulates.

from The Century Dictionary.

• noun Any vessel in which blood circulates in an animal body, whether artery, vein, or capillary.

from the GNU version of the Collaborative International Dictionary of English.

• (Anat.) Any vessel or canal in which blood circulates in an animal, as an artery or vein.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun anatomy A component of the circulatory system, such as an artery, capillary, or vein, that carries blood.

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

• noun a vessel in which blood circulates