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: Webster's Revised Unabridged Dictionary (1913)