actinic keratosis

n.
  1. A warty lesion, often premalignant, occurring on the sun-exposed skin of the face or hands, especially of light-skinned persons.senile keratosis
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.