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sinus node

noun

Definition of sinus node

: a small mass of tissue that is embedded in the musculature of the right atrium of higher vertebrates and that originates the impulses stimulating the heartbeat

Examples of sinus node in a Sentence

Recent Examples on the Web

 Over the course of a day, a person’s heart beats about 100,000 times, and each beat begins with an electrical signal generated in the sinus node in the heart’s upper right chamber. — Emily Sohn, Washington Post, "Everyone has heart palpitations, but for some it can be serious," 7 Mar. 2018

First Known Use of sinus node

1937, in the meaning defined above

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More Definitions for sinus node

sinus node

noun

Medical Definition of sinus node

: sinoatrial node

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