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
When transplanted into diabetic mice, the islet organoids rapidly vascularized and restored normal blood glucose levels for the duration of the experiment.
—
Neetika Walter, Interesting Engineering, 1 Jan. 2026
Gestational diabetes, defined by the University as a form of glucose intolerance first diagnosed during pregnancy, carries pregnancy risks and can increase the chance of future diabetes and heart disease for both the mother and her baby.
—Hannah Sacks, PEOPLE, 31 Dec. 2025
Cinnamon and cinnamon extracts have been reported in multiple trials and reviews to modestly lower fasting glucose and hemoglobin A1c (average blood sugar level over two or three months) in some people.
—Sara Hoffman, Verywell Health, 31 Dec. 2025
Alcohol can lower blood glucose because your liver is busy metabolizing alcohol instead of maintaining your blood sugar, leaving you feeling shaky, weak, or nauseated.
—Ciara Lucas, SELF, 30 Dec. 2025
See All Example Sentences for glucose
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Neetika Walter, Interesting Engineering, 1 Jan. 2026
Gestational diabetes, defined by the University as a form of glucose intolerance first diagnosed during pregnancy, carries pregnancy risks and can increase the chance of future diabetes and heart disease for both the mother and her baby.
—Hannah Sacks, PEOPLE, 31 Dec. 2025
Cinnamon and cinnamon extracts have been reported in multiple trials and reviews to modestly lower fasting glucose and hemoglobin A1c (average blood sugar level over two or three months) in some people.
—Sara Hoffman, Verywell Health, 31 Dec. 2025
Alcohol can lower blood glucose because your liver is busy metabolizing alcohol instead of maintaining your blood sugar, leaving you feeling shaky, weak, or nauseated.
—Ciara Lucas, SELF, 30 Dec. 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 4 Jan. 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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