water lemon

from WordNet (r) 3.0 (2006)

water lemon
    n 1: the edible yellow fruit of the Jamaica honeysuckle [syn:
         {bell apple}, {sweet cup}, {water lemon}, {yellow
         granadilla}]

from The Collaborative International Dictionary of English v.0.48

Water lemon \Wa"ter lem"on\ (Bot.)
   The edible fruit of two species of passion flower
   ({Passiflora laurifolia}, and {Passiflora maliformis}); -- so
   called in the West Indies.
   [1913 Webster]