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noun Pathology.
  1. a hereditary skin disease in which the epidermis continuously flakes off in large scales or plates.

Origin of ichthyosis

From New Latin, dating back to 1805–15; see origin at ichthy(o)-, -osis
Related formsich·thy·ot·ic [ik-thee-ot-ik] /ˌɪk θiˈɒt ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ichthyosis

Historical Examples

  • In ichthyosis, lepra, psoriasis, and some other scaly skin diseases.

    Cooley's Practical Receipts, Volume II

    Arnold Cooley

  • 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

  • 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

  • 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

British Dictionary definitions for ichthyosis


  1. a congenital disease in which the skin is coarse, dry, and scalyAlso called: xeroderma Nontechnical name: fishskin disease
Derived Formsichthyotic (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

Word Origin and History for ichthyosis


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

Online Etymology Dictionary, © 2010 Douglas Harper

ichthyosis in Medicine


  1. A congenital, often hereditary skin disease characterized by dry, thickened, scaly skin.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.