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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Food influences key biological pathways such as blood sugar and insulin sensitivity, chronic inflammation, immune and metabolic function and the gut microbiome.
—
Chrystle Fiedler, USA Today, 19 Sep. 2025
About two hours after consumption, everyone had their blood glucose and insulin levels checked.
—Christina Manian, Health, 19 Sep. 2025
Just kind of my body attacking itself and not producing insulin like everyone else.
—Annie Heilbrunn, San Diego Union-Tribune, 19 Sep. 2025
If your body does not have enough magnesium, your cells may not respond well to insulin, which can lead to higher blood sugar over time.
—Verywell Health, 18 Sep. 2025
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Chrystle Fiedler, USA Today, 19 Sep. 2025
About two hours after consumption, everyone had their blood glucose and insulin levels checked.
—Christina Manian, Health, 19 Sep. 2025
Just kind of my body attacking itself and not producing insulin like everyone else.
—Annie Heilbrunn, San Diego Union-Tribune, 19 Sep. 2025
If your body does not have enough magnesium, your cells may not respond well to insulin, which can lead to higher blood sugar over time.
—Verywell Health, 18 Sep. 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 20 Sep. 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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