'Monosaccharide' definitions:

Definition of 'monosaccharide'

(from WordNet)
noun
A sugar (like sucrose or fructose) that does not hydrolyse to give other sugars; the simplest group of carbohydrates [syn: monosaccharide, monosaccharose, simple sugar]

Definition of 'Monosaccharide'

From: GCIDE
  • Monosaccharide \Mon`o*sac"cha*ride\, n. Also -rid \-rid\ . [Mono- + saccharide.] (Chem.) A simple sugar; any of a number of sugars (including the trioses, tetroses, pentoses, hexoses, etc.), not decomposable into simpler sugars by hydrolysis. Specif., as used by some, a hexose. The monosaccharides are all open-chain compounds containing hydroxyl groups and either an aldehyde group or a ketone group. [Webster 1913 Suppl.]