glucose

UK: /ˈgluːkəʊz/, /ˈgluːkəʊs/ US: /ˈglukoʊs/ ,(glo̅o̅′kōs)

WordReference Random House Learner's Dictionary of American English © 2025

glu•cose /ˈglukoʊs/   n. [uncountable]

1. Biochemistry a simple sugar, C₆H₁₂O₆,, that is produced by plants during the process of photosynthesis and is the principal source of energy for all living organisms.

WordReference Random House Unabridged Dictionary of American English © 2025

glu•cose  (glo̅o̅′kōs), n. [Biochem.]

1. Biochemistry a sugar, C₆H₁₂O₆, having several optically different forms, the common dextrorotatory form (dextroglucose, ord -glucose)occurring in many fruits, animal tissues and fluids, etc., and having a sweetness about one half that of ordinary sugar, and the rare levorotatory form (levoglucose, or l -glucose) not naturally occurring.
2. Biochemistry Also called starch syrup. a syrup containing dextrose, maltose, and dextrine, obtained by the incomplete hydrolysis of starch.

• Greek glyk(ýs) sweet + French -ose -ose²
• French
• 1830–40

glu•cos′ic, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::

glucose / ˈɡluːkəʊz -kəʊs/ noun

1. a white crystalline monosaccharide sugar that has several optically active forms, the most abundant being dextrose: a major energy source in metabolism. Formula: C₆H₁₂O₆
2. a yellowish syrup (or, after desiccation, a solid) containing dextrose, maltose, and dextrin, obtained by incomplete hydrolysis of starch: used in confectionery, fermentation, etc

Etymology: 19th Century: from French, from Greek gleukos sweet wine; related to Greek glukus sweet