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

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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 Duffy died Monday, a year after being diagnosed with idiopathic pulmonary fibrosis. Julie Hinds, Detroit Free Press, 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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Dictionary Entries Near idiopathic

Cite this Entry

“Idiopathic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/idiopathic. Accessed 16 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

More from Merriam-Webster on idiopathic

Last Updated: - Updated example sentences
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