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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Insulin resistance is when your body doesn't respond properly to insulin, a hormone that helps move sugar through your blood to give you energy.8
Calcium: This helps your muscles work properly, including the function of the heart muscles.
—
Lauren O'Connor, Health, 5 Aug. 2025
Using it regularly before high-carb meals could reduce the frequency and size of glucose spikes, which may support lower fasting glucose and improved insulin sensitivity over time.
—Kathleen Ferraro, Verywell Health, 1 Aug. 2025
The disease can develop over time as the body develops resistance to insulin, a hormone made in the pancreas that helps your body convert the sugar in your blood to energy.
—New Atlas, 1 Aug. 2025
Over 15 days, participants receiving SANA at the highest dose (200 mg twice daily) experienced a weight reduction of up to 3% and improvements in insulin sensitivity.
—Thomas Westerholm, MSNBC Newsweek, 28 July 2025
See All Example Sentences for insulin
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Lauren O'Connor, Health, 5 Aug. 2025
Using it regularly before high-carb meals could reduce the frequency and size of glucose spikes, which may support lower fasting glucose and improved insulin sensitivity over time.
—Kathleen Ferraro, Verywell Health, 1 Aug. 2025
The disease can develop over time as the body develops resistance to insulin, a hormone made in the pancreas that helps your body convert the sugar in your blood to energy.
—New Atlas, 1 Aug. 2025
Over 15 days, participants receiving SANA at the highest dose (200 mg twice daily) experienced a weight reduction of up to 3% and improvements in insulin sensitivity.
—Thomas Westerholm, MSNBC Newsweek, 28 July 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 9 Aug. 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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