noun Biochemistry.

  1. any of certain carbohydrates derived from ribose by the replacement of a hydroxyl group with a hydrogen atom.
  2. the sugar, HOCH2(CHOH)2CH2CHO, obtained from DNA by hydrolysis.


  1. a pentose sugar obtained by the hydrolysis of DNA. Formula: C 5 H 10 O 4

1931, from deoxy- (because the 2′ hydroxyl (-OH) in the sugar is in this case reduced to a hydrogen (H) by loss of an oxygen) + ribose.


  1. A sugar that is a constituent of DNA.

  1. The sugar found in the side chains of DNA, differing from ribose in having a hydrogen atom instead of an OH group on one of its carbon atoms. Chemical formula: C5H10O4.

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