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n. pl. pit·y·ri·a·ses (-sēz′)
Any of various skin diseases of humans and animals, characterized by epidermal shedding of flaky scales.

[Greek pitūriāsis, from pitūra, grain husks, bran, dandruff, perhaps from dissimilation of *putūra; see pau- in Indo-European roots, or akin to pitulos, repetitive striking; see pet- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Pathology) any of a group of skin diseases characterized by the shedding of dry flakes of skin
2. (Veterinary Science) a similar skin disease of certain domestic animals
[C17: via New Latin from Greek pituriasis scurfiness, from pituron bran]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌpɪt əˈraɪ ə sɪs)

any of several skin diseases marked by the shedding of branlike scales.
[1685–95; < New Latin < Greek pitȳríāsis branlike eruption =pítȳr(on) bran, scale + -iāsis -iasis]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pityriasis - any of several skin disorders characterized by shedding dry flakes of skinpityriasis - any of several skin disorders characterized by shedding dry flakes of skin
dermatosis - disorder involving lesions or eruptions of the skin (in which there is usually no inflammation)
dandruff - a condition in which white scales of dead skin are shed by the scalp
pityriasis alba - common form of pityriasis (usually in children or young adults) characterized by round patches of depigmentation
pityriasis rosea - pityriasis in which an itchy rash develops over the trunk and extremities
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


n pitiriasis f; — alba pitiriasis alba; — rosea pitiriasis rosada; — versicolor pitiriasis versicolor
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
References in periodicals archive ?
A study based on the evaluation of skin infection prevalence among male children of the primary section in Jeddah, Saudi Arabia, found there was an increasing prevalence of 12.9% nevi, 11% head-lice, 8% pityriasis alba and 6.1% alopecia.17 The prevalence rate was similar to the present study (2.9% each) concerning acne vulgaris and warts.
PMH must be distinguished from some of its clinical mimickers, including vitiligo, hypopigmented mycosis fungoides, tinea versicolor, and pityriasis alba.
Accuracy of dermoscopic criteria for the diagnosis of psoriasis, dermatitis, lichen planus and pityriasis rosea.
A dermatologist was consulted, and then, pityriasis alba, reactive dermatitis, and zinc deficiency were suspected.
* Pityriasis rosea is a viral exanthem that may be associated with constitutional symptoms and often presents initially with a herald patch progressing to a classic "Christmas tree" distribution with a fine collarette of scale.
Objective: Comparison of efficacy of combination comprising 2% ketoconazole solution wash plus topical 1% clotrimazole versus topical 1% clotrimazole alone in management of patients with Pityriasis versicolor.
Pityriasis versicolor (PV) is a superficial fungal infection of skin, caused by genus Malassezia.1 M.
Christmas tree rash (pityriasis rosea) is a fine, itchy, scaly rash that usually appears first as a single patch on the chest, abdomen or back.
[1] Primary erythroderma arises on normal looking skin due to an underlying systemic disorder including malignancy or because of a drug reaction, while secondary erythroderma arises from pre-existing dermatoses like psoriasis, atopic dermatitis, Pityriasis rubra pilaris and actinic dermatosis.
Among all, 112 pieces of data were psoriasis, 61 seboreic dermatitis, 72 lichen planus, 49 pityriasis rosea, 52 cronic dermatitis and 20 pityriasis rubra pilaris.
Erythemato-squamous diseases to be classified include pityriasis rubra pilaris, seborrheic dermatitis, psoriasis, lichen planus, chronic dermatitis, and pityriasis rosea.
The most common viral infection was verruca, the most common bacterial infection was impetigo, the most common superficial fungal infection was pityriasis versicolor, and the most common parasitic infection was pediculosis capitis.