from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The three-segmented valve of the heart that keeps blood in the right ventricle from flowing back into the right atrium.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A heart valve with three cusps which prevents backflow of blood from the right ventricle into the right atrium.
from the GNU version of the Collaborative International Dictionary of English
- adj. the valve, consisting of three triangular membranous flaps, at the opening of the right auricle into the right ventricle in the heart of most mammals; -- sometimes called the tricuspid valves, each flap being regarded as a valve.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. valve with three cusps; situated between the right atrium and the right ventricle; allows blood to pass from atrium to ventricle and closes to prevent backflow when the ventricle contracts
Sorry, no etymologies found.