Webster's English Dictionary

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purpura

pur.pu.ra \'p*r-py*-r*\ \.p*r-'pyu.(*)r-ik\ n [NL, fr. L, purple color] : 
   any of several hemorrhagic states characterized by extravasation of bloo d 
   into the skin and mucous membranes resulting in patches of purplish 
   discoloration - pur.pu.ric aj