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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At the conclusion of season 12, Elizabeth, Nathan, Nathan's niece / adoptive daughter Allie (Jaeda Lily Miller), and Elizabeth's son Little Jack (Hyland Goodrich), headed to Cape Fullerton to stay at Charlotte's boarding house to be closer to an insulin lab so Little Jack, who has diabetes.
—
Breanne L. Heldman, PEOPLE, 2 Oct. 2025
When season 12 concluded, the family relocated to Charlotte's boarding home in Cape Fullerton so Elizabeth's diabetic son — Jack, named after his dad — could be closer to an insulin lab.
—Shania Russell, Entertainment Weekly, 2 Oct. 2025
People who have low potassium levels or who take certain medicines that may affect potassium levels, such as insulin, diuretics, ACE inhibitors, or ARBs, may be at higher risk from the potassium-lowering effects of apple cider vinegar.
—Karen Berger, Verywell Health, 1 Oct. 2025
With type 1 diabetes, the patient experiences a metabolic condition where the body becomes resistant to insulin or doesn’t make enough of it, per the CDC.
—Melissa Rudy, FOXNews.com, 30 Sep. 2025
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Breanne L. Heldman, PEOPLE, 2 Oct. 2025
When season 12 concluded, the family relocated to Charlotte's boarding home in Cape Fullerton so Elizabeth's diabetic son — Jack, named after his dad — could be closer to an insulin lab.
—Shania Russell, Entertainment Weekly, 2 Oct. 2025
People who have low potassium levels or who take certain medicines that may affect potassium levels, such as insulin, diuretics, ACE inhibitors, or ARBs, may be at higher risk from the potassium-lowering effects of apple cider vinegar.
—Karen Berger, Verywell Health, 1 Oct. 2025
With type 1 diabetes, the patient experiences a metabolic condition where the body becomes resistant to insulin or doesn’t make enough of it, per the CDC.
—Melissa Rudy, FOXNews.com, 30 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 7 Oct. 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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