The Collaborative International Dictionary of English v.0.48:

Sorbite \Sor"bite\, n. [L. sorbus service tree.] (Chem.)
   A sugarlike substance, isomeric with mannite and dulcite,
   found with sorbin in the ripe berries of the sorb, and
   extracted as a sirup or a white crystalline substance. --
   Sor*bit"ic, a.
   [1913 Webster]