noun
- A specialized bit of heart tissue that controls the heartbeat.
- synonyms: pacemaker, cardiac pacemaker, sinoatrial node
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). SA node. Retrieved September 22, 2026, from http://smartdefine.org/sa_node/definitions/1307912 |
| Chicago | WordNet. 2010. "SA node" http://smartdefine.org/sa_node/definitions/1307912 (accessed September 22, 2026). |
| Harvard | WordNet 2010, SA node, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/sa_node/definitions/1307912>. |
| MLA | WordNet. "SA node" 23 October 2010. Web. 22 September 2026. <http://smartdefine.org/sa_node/definitions/1307912> |