Source : Webster's Revised Unabridged Dictionary (1913)

Xeroderma \Xe`ro*der"ma\, n. [NL., fr. Gr. ? dry + ? skin.]
   (Med.)
   (a) Ichthyosis.
   (b) A skin disease characterized by the presence of numerous
       small pigmented spots resembling freckles, with which are
       subsequently mingled spots of atrophied skin.

Source : WordNet®

xeroderma
     n : a mild form of ichthyosis characterized by abnormal dryness
         and roughness of the skin [syn: {xerodermia}]