The Collaborative International Dictionary of English v.0.48:
adenoma \ad`e*no"ma\ ([a^]d`[-e]*n[=o]"m[.a]), n.; L. pl. -mata. [NL.; adeno- + -oma.] (Med.) A benign tumor of epithelial tissue with a glandlike structure. -- Ad`e*nom"a*tous, a.--AS [Webster 1913 Suppl.]WordNet (r) 3.0 (2006):
adenoma n 1: a benign epithelial tumor of glandular origin