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See more synonyms for idiopathic on Thesaurus.com
adjective Pathology.
  1. of unknown cause, as a disease.
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Origin of idiopathic

First recorded in 1660–70; idio- + -pathic
Related formsid·i·o·path·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Examples from the Web for idiopathic

Historical Examples

idiopathic in Medicine


  1. Of or relating to a disease having no known cause; agnogenic.
  2. Of or relating to a disease that is not the result of any other disease.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

idiopathic in Science


  1. Relating to or being a disease having no known cause.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.