Source : Webster's Revised Unabridged Dictionary (1913)

Purpura \Pur"pu*ra\, n. [L., purple, purple fish: cf. F.
   purpura. See {Purple}.]
   1. (Med.) A disease characterized by livid spots on the skin
      from extravasated blood, with loss of muscular strength,
      pain in the limbs, and mental dejection; the purples.
      --Dunglison.

   2. (Zo["o]l.) A genus of marine gastropods, usually having a
      rough and thick shell. Some species yield a purple dye.

Source : WordNet®

purpura
     n : any of several blood diseases causing subcutaneous bleeding
         [syn: {peliosis}]