sinoatrial

adjective

si·no·atri·al ˌsī-nō-ˈā-trē-əl

: of, involving, or being the sinus node

sinoatrial block

Example Sentences

Recent Examples on the Web These cells, known as your sinoatrial (SA) node, tell your heart when and how to beat in order to send oxygen-rich blood throughout your body. —

Rachel Nall, Msn, SELF, 18 Aug. 2022

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sinoatrial.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

Etymology

New Latin sinus + atrium

First Known Use

1913, in the meaning defined above

Time Traveler

The first known use of sinoatrial was in 1913

See more words from the same year

Cite this Entry

Style

“Sinoatrial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sinoatrial. Accessed 28 Mar. 2023.

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Medical Definition

sinoatrial

adjective

si·no·atri·al ˌsī-nō-ˈā-trē-əl

variants also sinuatrial

ˌsī-n(y)ü-

: of, involving, or being the sinoatrial node

sinoatrial block

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