Source : Webster's Revised Unabridged Dictionary (1913)

Water tupelo \Wa"ter tu"pe*lo\ (Bot.)
   A species of large tupelo ({Nyssa aquatica}) growing in
   swamps in the southern of the United States. See {Ogeechee
   lime}.

Source : WordNet®

Nyssa aquatica
     n : columnar swamp tree of southeastern to midwestern North
         America yielding pale soft easily worked wood [syn: {water
         gum}]