idiopathic

adjective

id·​i·​o·​path·​ic ˌi-dē-ə-ˈpa-thik How to pronounce idiopathic (audio)
1
: arising spontaneously or from an obscure or unknown cause : primary
idiopathic epilepsy
2
: peculiar to the individual
idiopathically adverb

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Idiopathic joins the combining form idio- (from Greek idios, meaning "one's own" or "private") with -pathic, a form that suggests the effects of disease. The combining form idio- is typically found in technical terms. Examples include idiographic, meaning "relating to or dealing with something concrete, individual, or unique"; idiolect, meaning "the language or speech pattern of one individual at a particular period of life"; and idiotype, meaning "the molecular structure and conformation of an antibody that confers its antigenic specificity." A more common idio- word is idiosyncrasy, which most commonly refers to an unusual way in which a person behaves or thinks, or to an unusual part or feature of something.

Examples of idiopathic in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Mark Weinman died of complications from idiopathic pulmonary fibrosis, a respiratory illness he was diagnosed with more than a decade earlier. Cliff Brunt, Sun Sentinel, 13 Feb. 2025 Dolen was 74 and had idiopathic pulmonary fibrosis, a progressive lung disease, said her husband, former Sun Sentinel arts editor John Dolen. Howard Cohen, Miami Herald, 3 Feb. 2025 The specific cause of peripheral neuropathy is sometimes unknown; this is referred to as idiopathic neuropathy. Ruth Jessen Hickman, Md, Health, 23 Dec. 2024 His death, in a hospital, was from the lung disease idiopathic pulmonary fibrosis, his family said in a statement. Jon Pareles, New York Times, 17 Dec. 2024 See All Example Sentences for idiopathic

Word History

First Known Use

1669, in the meaning defined at sense 1

Time Traveler
The first known use of idiopathic was in 1669

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Cite this Entry

“Idiopathic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/idiopathic. Accessed 26 Feb. 2025.

Medical Definition

idiopathic

adjective
id·​io·​path·​ic ˌid-ē-ə-ˈpath-ik How to pronounce idiopathic (audio)
: arising spontaneously or from an obscure or unknown cause : primary
idiopathic epilepsy
idiopathic thrombocytopenic purpura
idiopathically adverb
Last Updated: - Updated example sentences
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