the GNU version of the Collaborative International Dictionary of English
One of a class of substances (complex carbohydrates widely distributed in plants, as in fruits, gums, woods, hay, etc.) which yield pentoses on hydrolysis.
The Century Dictionary and Cyclopedia
n. One of a class of complex carbohydrates which yield pentoses when hydrolyzed. They occur in most plants, in many gums, in turf, humus, and lignite.
Word Usage
"This is a complete nonsense, because the brand name is not pentosan polusulphate and it is the trade name which is being marketed."