D defs.my
Entry 1 sense Webster, 1913

Monosaccharide

/mänˌ-əs-ăk'-ẽr-īdˌ/ · Mon·o·sac·cha·ride · IPA /mˌɑnəsˈækərˌaɪd/
01 n. A simple sugar; any of a number of sugars (including the trioses, tetroses, pentoses, hexoses, etc.), not decomposable into simpler sugars …
  1. 1.
    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.(Chem.)