sinoatrial node Hear it!

sinoatrial node definition

sino·atrial node (sī′nō ā′trē əl)

pacemaker (sense )
sometimes called sinoauricular node si′no·auric′u·lar node (-ô rik′yə lər)

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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