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
Instituting new protocols for insulin delivery and pill line procedures.
—
Walter Pavlo, Forbes.com, 10 Sep. 2025
Conventional insulin lasts just four hours.
—Neetika Walter, Interesting Engineering, 10 Sep. 2025
Before there was a federal Medicare price cap on insulin, several states took this route and implemented state caps.
—Ana Santos Rutschman, The Conversation, 9 Sep. 2025
Back in May, Kotb exclusively revealed to PEOPLE that her daughter Hope had been privately diagnosed with type 1 diabetes, an autoimmune disease which prevents the pancreas from making its own insulin, requiring vigilant blood sugar monitoring and frequent insulin injections.
—Rachel McRady, PEOPLE, 9 Sep. 2025
See All Example Sentences for insulin
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Walter Pavlo, Forbes.com, 10 Sep. 2025
Conventional insulin lasts just four hours.
—Neetika Walter, Interesting Engineering, 10 Sep. 2025
Before there was a federal Medicare price cap on insulin, several states took this route and implemented state caps.
—Ana Santos Rutschman, The Conversation, 9 Sep. 2025
Back in May, Kotb exclusively revealed to PEOPLE that her daughter Hope had been privately diagnosed with type 1 diabetes, an autoimmune disease which prevents the pancreas from making its own insulin, requiring vigilant blood sugar monitoring and frequent insulin injections.
—Rachel McRady, PEOPLE, 9 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 17 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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