from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A small mass of specialized cardiac muscle fibers, located in the wall of the right atrium of the heart, that receives heartbeat impulses from the sinoatrial node and directs them to the walls of the ventricles. Also called AV node.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a node of specialized heart muscle located in the septal wall of the right atrium; receives impulses from the sinoatrial node and transmits them to atrioventricular bundle
Sorry, no etymologies found.