The Collaborative International Dictionary of English v.0.48:

adipoma \ad`i*po"ma\ ([a^]d`[i^]*p[=o]"m[.a]), n.; L. pl.
   adipomata ([a^]d`[i^]*p[=o]"m[.a]*t[.a]). [NL. See
   adipose; -oma.] (Med.)
   An obsolete term for lipoma. -- Ad`i*pom"a*tous
   ([a^]d`[i^]*p[o^]m"[.a]*t[u^]s or
   [a^]d`[i^]*p[=o]"m[.a]*t[u^]s), a.
   [AS]

The Collaborative International Dictionary of English v.0.48:

Lipoma \Li*po"ma\ (l[i^]*p[=o]"m[.a]), n. [NL., from Gr. li`pos
   fat + -oma.] (Med.)
   A tumor consisting of fat or adipose tissue. --
   Li*pom"a*tous (-p[o^]m"[.a]*t[u^]s), a.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lipoma
    n 1: a tumor consisting of fatty tissue [syn: lipoma, adipose
         tumor]