Source : Webster's Revised Unabridged Dictionary (1913)

Adenoma \Ad`e*no"ma\, n.; L. pl. {-mata}. [NL.; adeno- + -oma.]
   (Med.)
   A benign tumor of a glandlike structure; morbid enlargement
   of a gland. -- {Ad`e*nom"a*tous}, a.

Source : WordNet®

adenoma
     n : a benign epithelial tumor of glandular origin
     [also: {adenomata} (pl)]