from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A venous sinus that opens into the right atrium of the heart and serves to drain the coronary veins.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a short sinus receiving most of the veins of the heart; empties into the right atrium
Sorry, no etymologies found.