erythrokeratoderma variabilis

[văr′ē-ābə-lĭs]
n.
  1. A hereditary skin disease characterized by tough, scaly plaques associated with erythroderma that may vary daily in size, shape, and position.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.