Source : Webster's Revised Unabridged Dictionary (1913)

Angioma \An`gi*o"ma\, n.; L. pl. {-omata}. [NL.; angio- + -oma.]
   (Med.)
   A tumor composed chiefly of dilated blood or lymph vessels.
   -- {An`gi*om"a*tous}, a.

Angioma \An`gi*o"ma\ (-[=o]"m[.a]), n. [Angio- + -oma.] (Med.)
   A tumor composed chiefly of dilated blood vessels.

Source : WordNet®

angioma
     n : a tumor consisting of a mass of blood or lymphatic vessels
     [also: {angiomata} (pl)]