arabinose

Pentose \Pen"tose\, n. [Penta- + -ose.] (Chem.) 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.]

Arabinose \Ar"a*bin*ose`\, n. (Chem.) A sugar of the composition C5H10O5, obtained from cherry gum by boiling it with dilute sulphuric acid. [1913 Webster]