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
Democrats, in his view, congratulated the Biden Administration for having lowered the price of insulin, then wondered why people voted for Trump.
—
Evan Osnos, New Yorker, 26 May 2025
As explained by the U.S. Center for Disease Control and Prevention (CDC), a lack of insulin means that blood sugar can't be used as energy and instead builds up in the bloodstream.
—Alyce Collins, MSNBC Newsweek, 25 May 2025
People with Type 1 diabetes can manage symptoms with insulin and are advised to follow a diet high in vegetables and fiber, but the disease isn’t reversible.
—Erika Edwards, NBC news, 23 May 2025
Which again, spurs the production of excess insulin, and in turn, the surge of androgens that can trigger the full slate of PCOS symptoms.
—Erica Sloan, SELF, 20 May 2025
See All Example Sentences for insulin
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Evan Osnos, New Yorker, 26 May 2025
As explained by the U.S. Center for Disease Control and Prevention (CDC), a lack of insulin means that blood sugar can't be used as energy and instead builds up in the bloodstream.
—Alyce Collins, MSNBC Newsweek, 25 May 2025
People with Type 1 diabetes can manage symptoms with insulin and are advised to follow a diet high in vegetables and fiber, but the disease isn’t reversible.
—Erika Edwards, NBC news, 23 May 2025
Which again, spurs the production of excess insulin, and in turn, the surge of androgens that can trigger the full slate of PCOS symptoms.
—Erica Sloan, SELF, 20 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 6 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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