lucuma mammosum

from The Collaborative International Dictionary of English v.0.48

Lucuma \Lu*cu"ma\, n. (Bot.)
   An American genus of sapotaceous trees bearing sweet and
   edible fruits.
   [1913 Webster]

   Note: {Lucuma mammosum} is called natural marmalade in the
         West Indies; {Lucuma Caimito}, of Peru, furnishes a
         delicious fruit called {lucuma} and {caimito}.
         [1913 Webster]