Dictionary.com
definitions

ameloblastoma

[ăm′ə-lō-blă-stō′mə]
n.
  1. A benign tumor, usually of the posterior regions of the mandible, composed of epithelial cells that resemble enamel-producing cells but do not form enamel.adamantinoma
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.