Cockayne's syndrome

[kŏ-kānz]
n.
  1. A hereditary syndrome characterized by dwarfism, a precociously senile appearance, pigmentary degeneration of the retina, optic atrophy, deafness, sensitivity to sunlight, and mental retardation.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.