Source : Webster's Revised Unabridged Dictionary (1913)

Epithelioma \Ep`i*the`li*o"ma\, n. [NL. See {Epithelium}, and
   {-oma}.] (Med.)
   A malignant growth containing epithelial cells; -- called
   also {epithelial cancer}.

Source : WordNet®

epithelioma
     n : a malignant tumor of the epithelial tissue
     [also: {epitheliomata} (pl)]