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Pentose
CIDE DICTIONARY
Pentose, n. [Penta- + -ose.].
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.]
OXFORD DICTIONARY
Pentose, n. Biochem. any monosaccharide containing five carbon atoms, including ribose.
Etymology
PENTA- + -OSE(2)
For further exploring for "Pentose" in Webster Dictionary Online
