noun Pathology.
a disease characterized by purple or brownish-red spots on the skin or mucous membranes, caused by the extravasation of blood.

1680–90; < Neo-Latin, special use of Latin purpura. See purple

purpuric [pur-pyoor-ik] , adjective
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World English Dictionary
purpura (ˈpɜːpjʊrə)
pathol any of several blood diseases causing purplish spots or patches on the skin due to subcutaneous bleeding
[C18: via Latin from Greek porphura a shellfish yielding purple dye]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1753, from Mod.L., from L. purpura (see purple). Disease characterized by purple patches on the skin.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

purpura pur·pu·ra (pûr'pə-rə, -pyə-)
A condition characterized by hemorrhages in the skin and mucous membranes that result in the appearance of purplish spots or patches. Also called peliosis.

The American Heritage® Stedman's Medical Dictionary
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