urushiol

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noun uru·shi·ol \yu̇-ˈrü-shē-ˌȯl, u̇-ˈrü-, -ˌōl\

Definition of urushiol

  1. :  a mixture of catechol derivatives with saturated or unsaturated side chains of 15 or 17 carbon atoms that is an oily toxic irritant substance present in poison ivy and some related plants (such as poison oak and poison sumac)

Origin and Etymology of urushiol

International Scientific Vocabulary, from Japanese urushi lacquer + International Scientific Vocabulary 1-ol


First Known Use: 1908


Medical Dictionary

urushiol

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noun uru·shi·ol \(y)u̇-ˈrü-shē-ˌȯl, -ˌōl\

Medical Definition of urushiol

  1. :  a mixture of pyrocatechol derivatives with saturated or unsaturated side chains of 15 or 17 carbon atoms that is an oily toxic irritant principle present in poison ivy and some related plants of the genus Rhus


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