[ fruhk-tohs, froo k-, frook- ]
/ ˈfrʌk toʊs, ˈfrʊk-, ˈfruk- /


Chemistry, Pharmacology. a yellowish to white, crystalline, water-soluble, levorotatory ketose sugar, C6H12O6, sweeter than sucrose, occurring in invert sugar, honey, and a great many fruits: used in foodstuffs and in medicine chiefly in solution as an intravenous nutrient.

Nearby words

  1. fructify,
  2. fructo-,
  3. fructofuranose,
  4. fructokinase,
  5. fructosan,
  6. fructosemia,
  7. fructoside,
  8. fructosuria,
  9. fructuous,
  10. fructuously

Origin of fructose

First recorded in 1860–65; fruct- + -ose2

Also called levulose, fruit sugar. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for fructose

British Dictionary definitions for fructose


/ (ˈfrʌktəʊs, -təʊz, ˈfrʊk-) /


a white crystalline water-soluble sugar occurring in honey and many fruits. Formula: C 6 H 12 O 6Also called: laevulose, fruit sugar

Word Origin for fructose

C19: from Latin frūctus fruit + -ose ²

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for fructose



sugar found in fruit, 1864, coined in English from Latin fructus (see fruit) + chemical suffix -ose.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for fructose


[ frŭktōs′, fruk- ]


A very sweet sugar occurring in many fruits and honey and used as a preservative for foodstuffs and as an intravenous nutrient.fruit sugar levulose

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for fructose


[ frŭktōs′ ]

A simple sugar (monosaccharide) found in honey, many fruits, and some vegetables. Fructose linked to glucose is the structure of table sugar, or sucrose. Fructose is an important source of energy for cellular processes. Chemical formula: C6H12O6.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.