• synonyms


  1. Pathology. any of various skin diseases marked by the shedding of branlike scales of epidermis.
  2. Veterinary Pathology. a skin disease in various domestic animals marked by dry scales.
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Origin of pityriasis

1685–95; < New Latin < Greek pitȳríāsis branlike eruption, equivalent to pítȳr(on) bran, scale + -iāsis -iasis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for pityriasis

Historical Examples

  • Eczema and psoriasis, pityriasis, impetigo, and porrigo decalvans are forms of skin eruption seen.

    A System of Practical Medicine By American Authors, Vol. II


  • Since Pityriasis is endemic to Borneo, it probably was detached from the parent stock at an early period.

  • The Australasian affinities of Pityriasis emphasize its zoogeographical peculiarities.

  • How is pityriasis rosea distinguished from ringworm, psoriasis and the squamous syphiloderm?

    Essentials of Diseases of the Skin

    Henry Weightman Stelwagon

  • Pityriasis, a skin eruption attended with branlike desquamation.

    The Nuttall Encyclopaedia

    Edited by Rev. James Wood

British Dictionary definitions for pityriasis


  1. any of a group of skin diseases characterized by the shedding of dry flakes of skin
  2. a similar skin disease of certain domestic animals
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Word Origin

C17: via New Latin from Greek pituriasis scurfiness, from pituron bran
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

pityriasis in Medicine


n. pl. pit•y•ri•a•ses (-sēz′)
  1. Any of various skin diseases of humans and animals, characterized by epidermal shedding of flaky scales.
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Related formspit′y•ria•sic (-sĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.