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.
Bernabé Williams Figueroa Sr. died in 2001 due to idiopathic pulmonary fibrosis, a type of IDL. Scott Thompson, Fox News, 28 Feb. 2025 The American Gastroenterological Association has recommended magnesium oxide, among several other treatments, for chronic idiopathic constipation.2 The use of magnesium for constipation should be discussed with your primary healthcare provider. 2. Jennifer Lefton, Ms, Rd/n, Cnsc, Fand, Verywell Health, 26 Feb. 2025 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 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 9 Mar. 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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