The Collaborative International Dictionary of English v.0.48:

angioma \an`gi*o"ma\ ([a^]n`j[i^]*[=o]"m[.a]), n.; L. pl.
   -omata (-[=o]"m[.a]*t[.a]). [NL.; angio- + -oma.] (Med.)
   A tumor composed chiefly of blood or lymph vessels. --
   an`gi*om"a*tous ([a^]n`j[i^]*[=o]"m[.a]*t[u^]s), a. --AS
   [Webster 1913 Suppl. + AS]

WordNet (r) 3.0 (2006):

angiomatous
    adj 1: of or related to or having a tumor of the kind known as
           an angioma