Source : Webster's Revised Unabridged Dictionary (1913)

Tolu \To*lu"\, n.
   A fragrant balsam said to have been first brought from
   Santiago de Tolu, in New Granada. See {Balsam of Tolu}, under
   {Balsam}.

   {Tolu tree} (Bot.), a large tree ({Myroxylon toluiferum}),
      the wood of which is red in the center, and has an
      aromatic rose odor. It affords the balsam called tolu.

Source : WordNet®

tolu
     n 1: an aromatic balsam
     2: aromatic yellowish brown balsam from the tolu balsam tree
        used especially in cough syrups [syn: {balsam of tolu}, {tolu
        balsam}]