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
Recent Examples on the Web
Barbie is launching a doll with Type 1 diabetes, complete with blood sugar meter and insulin pump, for its Fashionistas line in a partnership with the diabetes research organization Breakthrough T1D.
—
USA Today, 12 July 2025
Mattel recently debuted a doll that is dressed in a playful blue polka-dot outfit, sporting a matching pastel purse and, most notably, wearing a continuous glucose monitor on her arm and an insulin pump clipped to her waist.
—Maggie McGrath, Forbes.com, 11 July 2025
Exercise spurs insulin sensitivity by assisting insulin signaling in your muscles to take in glucose and use it as fuel.
—Bryant Stamford, The Courier-Journal, 10 July 2025
But a sufficient supply can be harder to maintain when a disaster knocks out power, because insulin should be kept cool, and medical facilities and drugstores may be harder for patients to reach.
—Lori Hunter, The Conversation, 8 July 2025
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USA Today, 12 July 2025
Mattel recently debuted a doll that is dressed in a playful blue polka-dot outfit, sporting a matching pastel purse and, most notably, wearing a continuous glucose monitor on her arm and an insulin pump clipped to her waist.
—Maggie McGrath, Forbes.com, 11 July 2025
Exercise spurs insulin sensitivity by assisting insulin signaling in your muscles to take in glucose and use it as fuel.
—Bryant Stamford, The Courier-Journal, 10 July 2025
But a sufficient supply can be harder to maintain when a disaster knocks out power, because insulin should be kept cool, and medical facilities and drugstores may be harder for patients to reach.
—Lori Hunter, The Conversation, 8 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 20 Jul. 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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