u·ru·shi·ol ( -r  sh -ôl , - l, - l)n. A toxic substance present in the resin or on the surface of plants of the genus Rhus, including poison ivy and the lacquer tree, from which a black Japanese lacquer is obtained. [Japanese urushi, lacquer + -ol.] |
urushiol [ˈuːrʊʃɪˌɒl uːˈruː-]
n
(Chemistry / Elements & Compounds) a poisonous pale yellow liquid occurring in poison ivy and the lacquer tree
[from Japanese urushi lacquer + -ol2]
| urushiol (-rsh-ôl, -l) 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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