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
Millions more with Type 2 diabetes also take insulin as their disease advances.
—
Ken Alltucker, USA Today, 31 Oct. 2025
Exercise promotes insulin sensitivity (the opposite of insulin resistance), and this is a great health benefit, but the effect is short lived and must be renewed daily, just like taking a pill.
—Bryant Stamford, Louisville Courier Journal, 30 Oct. 2025
These small wearable devices track glucose in real time, often syncing with smartphone apps or insulin pumps to help patients make faster, safer decisions about their health.
—Amanda Castro, MSNBC Newsweek, 26 Oct. 2025
The site became overcrowded and used controversial treatments such as electroshock and insulin coma therapy, according to local reports, and since its abandonment, many visitors report paranormal activity in the former ward buildings.
—Deirdre Bardolf, FOXNews.com, 25 Oct. 2025
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Ken Alltucker, USA Today, 31 Oct. 2025
Exercise promotes insulin sensitivity (the opposite of insulin resistance), and this is a great health benefit, but the effect is short lived and must be renewed daily, just like taking a pill.
—Bryant Stamford, Louisville Courier Journal, 30 Oct. 2025
These small wearable devices track glucose in real time, often syncing with smartphone apps or insulin pumps to help patients make faster, safer decisions about their health.
—Amanda Castro, MSNBC Newsweek, 26 Oct. 2025
The site became overcrowded and used controversial treatments such as electroshock and insulin coma therapy, according to local reports, and since its abandonment, many visitors report paranormal activity in the former ward buildings.
—Deirdre Bardolf, FOXNews.com, 25 Oct. 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 Nov. 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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