purpura Meaning, Definition & Usage

  1. noun any of several blood diseases causing subcutaneous bleeding
    peliosis.

WordNet

Pur"pu*ra noun
Etymology
L., purple, purple fish: cf. F. purpura. See Purple.
Definitions
  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. (Zoöl.) A genus of marine gastropods, usually having a rough and thick shell. Some species yield a purple dye.

Webster 1913