Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A small mass of specialized cardiac muscle fibers located in the posterior wall of the right atrium of the heart that acts as a pacemaker by generating at regular intervals the electric impulses of the heartbeat.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a specialized bit of heart tissue that controls the heartbeat
Etymologies
Sorry, no etymologies found.
Support
Help support Wordnik (and make this page ad-free) by adopting the word sinoatrial node.
Examples
Sorry, no example sentences found.
Comments
Log in or sign up to get involved in the conversation. It's quick and easy.