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
While protein can also be converted into glucose and used for energy, that process is slower and less efficient.
—
Christina Manian, Health, 14 July 2025
If such adjustments are not made, glucose cannot enter.
—Bryant Stamford, The Courier-Journal, 10 July 2025
Insulin signaling is impacted by Alzheimer’s disease, limiting the body’s ability to utilize glucose effectively and requiring alternative energy sources.
—Amy Brownstein, Verywell Health, 9 July 2025
The doll has a continuous glucose monitor attached to her arm and an insulin pump attached to her waist.
—Doha Madani, NBC news, 9 July 2025
See All Example Sentences for glucose
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Christina Manian, Health, 14 July 2025
If such adjustments are not made, glucose cannot enter.
—Bryant Stamford, The Courier-Journal, 10 July 2025
Insulin signaling is impacted by Alzheimer’s disease, limiting the body’s ability to utilize glucose effectively and requiring alternative energy sources.
—Amy Brownstein, Verywell Health, 9 July 2025
The doll has a continuous glucose monitor attached to her arm and an insulin pump attached to her waist.
—Doha Madani, NBC news, 9 July 2025
See All Example Sentences for glucose
Cite this Entry
“Glucose.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/glucose. Accessed 19 Jul. 2025.
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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