Source : Webster's Revised Unabridged Dictionary (1913)

Carcinoma \Car`ci*no"ma\, n. [L., fr. Gr. ?, fr. ? crab, cancer.
   See {-oma}.] (Med.)
   A cancer. By some medical writers, the term is applied to an
   indolent tumor. See {Cancer}. --Dunglison.

Source : WordNet®

carcinoma
     n : any malignant tumor derived from epithelial tissue; one of
         the four major types of cancer
     [also: {carcinomata} (pl)]