basal cell nevus

n.
  1. A hereditary disease characterized by lesions of the eyelids, nose, cheeks, neck, and axillae that are usually benign and that appear as uneroded papules histologically indistinguishable from basal cell epithelioma.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.