seborrheic keratosis

n.

A superficial, benign, verrucose lesion consisting of proliferating epidermal cells enclosing horn cysts, usually appearing on the face, trunk, or extremities in adulthood.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.