noun, plural id·i·op·a·thies.

a disease not preceded or occasioned by any known morbid condition.

Origin of idiopathy

1630–40; < New Latin idiopathīa < Greek idiopátheia disease or affection of local origin. See idio-, -pathy Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Contemporary Examples of idiopathy

British Dictionary definitions for idiopathy


noun plural -thies

any disease of unknown cause
Derived Formsidiopathic (ˌɪdɪəʊˈpæθɪk), 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 idiopathy

1640s, Modern Latin, from Greek idiopatheia, from comb. form of idios "one's own" (see idiom) + -patheia, comb. form of pathos "suffering, disease, feeling" (see pathos). Related: idiopathic.

Online Etymology Dictionary, © 2010 Douglas Harper

idiopathy in Medicine




A disease of unknown origin or cause.
A primary disease arising spontaneously with no apparent external cause.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.