Source : Webster's Revised Unabridged Dictionary (1913)

Tangelo \Tan"ge*lo\ (t[a^]n"j[-e]*l[=o]), n. [Tangerine +
   pomelo.]
   A hybrid between the tangerine orange and the grapefruit, or
   pomelo; also, the fruit.

Source : WordNet®

tangelo
     n 1: hybrid between grapefruit and mandarin orange; cultivated
          especially in Florida [syn: {tangelo tree}, {ugli fruit},
           {Citrus tangelo}]
     2: large sweet juicy hybrid between tangerine and grapefruit
        having a thick wrinkled skin [syn: {ugli}, {ugli fruit}]