Source : Webster's Revised Unabridged Dictionary (1913)

Nelumbo \Ne*lum"bo\, n. [Ceylonese word.] (Bot.)
   A genus of great water lilies. The North American species is
   {Nelumbo lutea}, the Asiatic is the sacred lotus, {N.
   speciosa}. [Written also {Nelumbium}.]

Source : WordNet®

Nelumbo
     n : sometimes placed in the family Nymphaeaceae: lotuses [syn: {genus
         Nelumbo}]