deoxyribose \deoxyribose\ n.
a pentose ({C5H10O4}) in which one of the hydroxyl groups of
ribose has been replaced by a hydrogen. In deoxyribonucleic
acids, the deoxyribose is {D-2-deoxyribose}, in which the
hydroxyl at the 2 position of ribose is the one which is
replaced by hydrogen.
[PJC]