sinoatrial node

noun

: sinus node

Examples of sinoatrial node in a Sentence

Recent Examples on the Web

One wire rests near the sinoatrial node, and the second in one of the heart’s ventricles. — Virginia Singla, Discover Magazine, 15 Dec. 2023

Calcium does this by flowing in and out of your heart cells after being triggered by an electrical signal from the sinoatrial node, or the heart's natural pacemaker. — Sara Hoffman, Verywell Health, 6 May 2026

By working with human pluripotent stem cells, which can transform into many different types of tissue, the researchers created a three-dimensional sinoatrial node organoid capable of generating electrical impulses, the South China Morning Post reported. — Bojan Stojkovski, Interesting Engineering, 23 May 2026

Word History

First Known Use

1913, in the meaning defined above

Rhymes for sinoatrial node

• photocathode
• photodiode
• abode
• anode
• barcode
• bestowed
• boatload
• borrowed
• carload
• caseload
• cathode
• commode

Medical Definition

sinoatrial node

noun

: a small mass of tissue that is made up of Purkinje fibers, ganglion cells, and nerve fibers, that is embedded in the musculature of the right atrium of higher vertebrates, and that originates the impulses stimulating the heartbeat

called also S-A node, sinus node