Source : Webster's Revised Unabridged Dictionary (1913)

Mannite \Man"nite\, n. [Cf. F. mannite.]
   1. (Chem.) A white crystalline substance of a sweet taste
      obtained from a so-called manna, the dried sap of the
      flowering ash ({Fraxinus ornus}); -- called also
      {mannitol}, and {hydroxy hexane}. Cf. {Dulcite}.