leprechaunism

[lĕprĭ-kŏn′ĭz′əm]
n.
  1. A rare genetic disorder characterized by mental and physical retardation, emaciation, endocrine disorders, hirsutism, and facial features dominated by large wide-set eyes and large low-set ears.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.