Pentosan
Pronunciation : Pen"to*san
Part of Speech : n.
Definition : Defn: One of a class of substances (complex carbohydrates widely distributed in plants, as in fruits, gums, woods, hay, etc.) which yield pentoses on hydrolysis.
Also -sane. [From Pentose.] (Chem.)
Source : Webster's Unabridged Dictionary, 1913