sorbin

from The Century Dictionary.

• noun A glucose sugar (C₆H₁₂O₆), obtained from mountain-ash berries. It is crystalline, is very sweet, and reduces copper solutions, but does not ferment with yeast.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) An unfermentable sugar, isomeric with glucose, found in the ripe berries of the rowan tree, or sorb, and extracted as a sweet white crystalline substance; -- called also mountain-ash sugar.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun organic chemistry An unfermentable sugar, isomeric with glucose, found in the ripe berries of the rowan tree, or sorb.