insulin
noun
in·su·lin
ˈin(t)-s(ə-)lən 
: a protein pancreatic hormone secreted by the beta cells of the islets of Langerhans that is essential especially for the metabolism of carbohydrates and the regulation of glucose levels in the blood and that when insufficiently produced results in diabetes mellitus
Examples of insulin in a Sentence
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That is why some Medicare Advantage plans make maintenance drugs for chronic patients (such as insulin for diabetics) available for free or at very low cost.
—
John C. Goodman, Forbes.com, 6 June 2025
That’s because blood sugar rises and falls in regular patterns over the course of the day, and as the day goes on, the body becomes less insulin sensitive.
—The New York Times News Service Syndicate, San Diego Union-Tribune, 3 June 2025
Researchers collected blood from participants and will look for clues tying exercise to cancer prevention, whether through insulin processing or building up the immune system or something else.
—Carla K. Johnson, Denver Post, 1 June 2025
Maitake has been studied for its ability to improve insulin sensitivity and support metabolic balance.
—Laura Solla, Vogue, 30 May 2025
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John C. Goodman, Forbes.com, 6 June 2025
That’s because blood sugar rises and falls in regular patterns over the course of the day, and as the day goes on, the body becomes less insulin sensitive.
—The New York Times News Service Syndicate, San Diego Union-Tribune, 3 June 2025
Researchers collected blood from participants and will look for clues tying exercise to cancer prevention, whether through insulin processing or building up the immune system or something else.
—Carla K. Johnson, Denver Post, 1 June 2025
Maitake has been studied for its ability to improve insulin sensitivity and support metabolic balance.
—Laura Solla, Vogue, 30 May 2025
See All Example Sentences for insulin
Cite this Entry
“Insulin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/insulin. Accessed 10 Jun. 2025.
Copy CitationKids Definition
insulin
noun
in·su·lin
ˈin(t)-s(ə-)lən
: a hormone that is produced by the pancreas and is necessary for the normal use of glucose by the body
Medical Definition
insulin
noun
in·su·lin
ˈin(t)-s(ə-)lən
: a protein hormone that is synthesized in the pancreas from proinsulin and secreted by the beta cells of the islets of Langerhans, that is essential for the metabolism of carbohydrates, lipids, and proteins, that regulates blood sugar levels by facilitating the uptake of glucose into tissues, by promoting its conversion into glycogen, fatty acids, and triglycerides, and by reducing the release of glucose from the liver, and that when produced in insufficient quantities results in diabetes mellitus see iletin
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