A monosaccharide containing five carbon atoms in the molecule; e.g., arabinose, lyxose, ribose, xylose, xylulose.
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pen·tose 'pen-.tōs, -.tōz n a monosaccharide C5H10O5 (as ribose) that contains five carbon atoms in a molecule
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n.
a simple sugar with five carbon atoms: for example, ribose and xylose.
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pen·tose (penґtōs) a monosaccharide containing five carbon atoms in a molecule.Medical dictionary. 2011.