renin

noun

re·​nin ˈrē-nən How to pronounce renin (audio)
ˈre-
: a proteolytic enzyme of the kidney that plays a major role in the release of angiotensin

Examples of renin in a Sentence

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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The latter is for medicines that block the B1 receptors found in the heart, which when activated, focus on elevated heart rate, increasing pumping force and releasing a kidney enzyme called renin. — Krystal Nurse, USA TODAY, 13 Jan. 2025 The kidneys respond by secreting a substance, renin, which starts a cascade (the renin-angiotensin system) that causes the blood pressure to go up. — Dr. Keith Roach, oregonlive, 8 Sep. 2023

Word History

Etymology

International Scientific Vocabulary, from Latin renes

First Known Use

1903, in the meaning defined above

Time Traveler
The first known use of renin was in 1903

Rhymes for renin

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“Renin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/renin. Accessed 24 Mar. 2025.

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Medical Definition

renin

noun
re·​nin
ˈrē-nən also ˈren-ən
: a proteolytic enzyme of the blood that is produced and secreted by the juxtaglomerular cells of the kidney and hydrolyzes angiotensinogen to angiotensin I

More from Merriam-Webster on renin

Britannica.com: Encyclopedia article about renin

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