ameloblastic fibroma

[ăm′ə-lō-blăstĭk]
n.
  1. A benign mixed tumor of odontogenic origin, distinguished by a simultaneous neoplastic proliferation of both epithelial and mesenchymal components of the tooth bud without the production of hard tissue.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.