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[ik-thee-oh-sis] /ˌɪk θiˈoʊ sɪs/
noun, Pathology.
a hereditary skin disease in which the epidermis continuously flakes off in large scales or plates.
Origin of ichthyosis
1805-15; < New Latin; see ichthy(o)-, -osis
Related forms
[ik-thee-ot-ik] /ˌɪk θiˈɒt ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for ichthyosis
Historical Examples
  • ichthyosis simplex and ichthyosis hystrix, terms commonly employed to designate the mild and severe forms respectively.

    Essentials of Diseases of the Skin Henry Weightman Stelwagon
  • In ichthyosis, lepra, psoriasis, and some other scaly skin diseases.

  • All however were well nourished, and their functions, save that of the skin (five had acne and one ichthyosis) well performed.

    The Criminal Havelock Ellis
  • How is ichthyosis to be distinguished from eczema, psoriasis, and other scaly inflammatory diseases?

    Essentials of Diseases of the Skin Henry Weightman Stelwagon
  • In severe cases of ichthyosis hystrix it may be necessary, also, to employ caustics or the knife.

    Essentials of Diseases of the Skin Henry Weightman Stelwagon
  • So are the elbows and the knees; and similar portions of the thighs and the arms may be found affected with ichthyosis.

    On the Genesis of Species St. George Mivart
British Dictionary definitions for ichthyosis


a congenital disease in which the skin is coarse, dry, and scaly Also called xeroderma Nontechnical name fishskin disease
Derived Forms
ichthyotic (ˌɪkθɪˈɒtɪk) adjective
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
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Word Origin and History for ichthyosis

1815, Modern Latin, from Greek ikhthys "fish" + -osis.

Online Etymology Dictionary, © 2010 Douglas Harper
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ichthyosis in Medicine

ichthyosis ich·thy·o·sis (ĭk'thē-ō'sĭs)
A congenital, often hereditary skin disease characterized by dry, thickened, scaly skin. Also called alligator skin, fish skin, fishskin disease, ichthyosis sauroderma.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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