purpura, n. [L., purple, purple fish: cf. F. purpura. See Purple.].
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. [1913 Webster]
A genus of marine gastropods, usually having a rough and thick shell. Some species yield a purple dye. [1913 Webster]
purpura, n.
1 a disease characterized by purple or livid spots on the skin, due to internal bleeding from small blood vessels.
2 any mollusc of the genus Purpura, some of which yield a purple dye.