Definitions

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

  • n. A valve of the heart, composed of two triangular flaps, that is located between the left atrium and left ventricle and regulates blood flow between these chambers. Also called bicuspid valve, left atrioventricular valve.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The valve that divides the left atrium and left ventricle of the heart

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

  • n. valve with two cusps; situated between the left atrium and the left ventricle

Etymologies

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