urushiol

[ oo-roo-shee-awl, -ol ]

noun
  1. a toxic, liquid, catechol derivative, the active irritant principle in several species of the plant genus Rhus, as in poison ivy.

Origin of urushiol

1
1910–15; <Japanese urushi lacquer + -ol1

Words Nearby urushiol

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British Dictionary definitions for urushiol

urushiol

/ (ˈuːrʊʃɪˌɒl, uːˈruː-) /


noun
  1. a poisonous pale yellow liquid occurring in poison ivy and the lacquer tree

Origin of urushiol

1
from Japanese urushi lacquer + -ol ²

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for urushiol

urushiol

[ u-rōōshē-ôl′, -ōl′ ]


  1. A toxic substance present in the resin or on the surface of plants of the genus Rhus (syn. Toxicodendron). Urushiol is a mixture of several derivatives of catechol and is the irritating substance in poison ivy.

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