Main Entry: pen·tose Pronunciation: 'pen-"tOs, -"tOz Function: noun : a monosaccharide C5H10O5 (as ribose) thatcontains five carbon atoms in a molecule
pentose pen·tose (pěn'tōs', -tōz') n. Any of a class of monosaccharides having five carbon atoms per molecule and including ribose and several other sugars.