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
Our bodies are more sensitive to insulin in the morning.
—
Bethany Thayer, Freep.com, 19 July 2025
Empowering caregivers and even neighbors to step in with basic emergency training — how to assist someone on oxygen, what to do if insulin is spoiled — can create a failsafe system when the grid goes down.
—John Samuels, Forbes.com, 18 July 2025
The change in post-meal insulin levels was also lower among the curcumin and the combination groups compared to the placebo.6
4.
—Ross Phan, Verywell Health, 18 July 2025
Counterfeit versions of these drugs, often sold online from foreign countries, may contain undisclosed or unsafe ingredients, including insulin.
—Beth Warren, Nashville Tennessean, 17 July 2025
See All Example Sentences for insulin
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Bethany Thayer, Freep.com, 19 July 2025
Empowering caregivers and even neighbors to step in with basic emergency training — how to assist someone on oxygen, what to do if insulin is spoiled — can create a failsafe system when the grid goes down.
—John Samuels, Forbes.com, 18 July 2025
The change in post-meal insulin levels was also lower among the curcumin and the combination groups compared to the placebo.6
4.
—Ross Phan, Verywell Health, 18 July 2025
Counterfeit versions of these drugs, often sold online from foreign countries, may contain undisclosed or unsafe ingredients, including insulin.
—Beth Warren, Nashville Tennessean, 17 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 29 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share