'ribose' definitions:

Definition of 'ribose'

(from WordNet)
noun
A pentose sugar important as a component of ribonucleic acid

Definition of 'ribose'

From: GCIDE
  • Pentose \Pen"tose\, n. [Penta- + -ose.] (Chem.) Any of a group of sugars of the formula C5H10O5, such as as arabinose or ribose; -- so called from the five carbon atoms in the molecule. They are not fermented by yeast. [Webster 1913 Suppl.]