1
: a crystalline sugar C6H12O6
specifically
: the sweet colorless soluble dextrorotatory form that occurs widely in nature and is the usual form in which carbohydrate is assimilated by animals
2
: a light-colored syrup made from cornstarch
Examples of glucose in a Sentence
Recent Examples on the Web
Fiber slows digestion, preventing sharp glucose spikes while delivering antioxidants that protect brain cells.
—
Deirdre Bardolf, FOXNews.com, 11 Feb. 2026
It’s also been promoted online for blood sugar control, but experts said there isn't enough evidence showing that taking CoQ10 reliably improves glucose levels.
—Sarah Garone, Health, 10 Feb. 2026
How Alcohol Lowers Blood Sugar Levels Alcohol lowers your blood sugar by limiting your liver’s ability to release glucose.
—Brandi Jones, Verywell Health, 10 Feb. 2026
The latter receptors increase glucose levels in the blood, which might seem contradictory for treating metabolic issues such as diabetes.
—Bethany Brookshire, Scientific American, 6 Feb. 2026
See All Example Sentences for glucose
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Deirdre Bardolf, FOXNews.com, 11 Feb. 2026
It’s also been promoted online for blood sugar control, but experts said there isn't enough evidence showing that taking CoQ10 reliably improves glucose levels.
—Sarah Garone, Health, 10 Feb. 2026
How Alcohol Lowers Blood Sugar Levels Alcohol lowers your blood sugar by limiting your liver’s ability to release glucose.
—Brandi Jones, Verywell Health, 10 Feb. 2026
The latter receptors increase glucose levels in the blood, which might seem contradictory for treating metabolic issues such as diabetes.
—Bethany Brookshire, Scientific American, 6 Feb. 2026
See All Example Sentences for glucose
Cite this Entry
“Glucose.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/glucose. Accessed 14 Feb. 2026.
Copy CitationKids Definition
glucose
noun
glu·cose
ˈglü-ˌkōs 
: a sugar that occurs especially in a naturally occurring form that is found in plants, fruits, and blood and is a source of energy for living things
Medical Definition
glucose
noun
glu·cose
ˈglü-ˌkōs, -ˌkōz
: an optically active sugar C6H12O6 that has an aldehydic carbonyl group
especially
: the sweet colorless soluble dextrorotatory form that occurs widely in nature and is the usual form in which carbohydrate is assimilated by animals
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