urushiol(redirected from Tetrahydrourushiol)
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u·ru·shi·ol(o͝o-ro͞o′shē-ôl′, -ōl′, -ŏl′)
An oily, toxic substance composed of phenolic compounds that is present in the sap of various plants of the family Anacardiaceae and especially the genus Toxicodendron, including poison ivy, poison sumac, and the lacquer tree.
[Japanese urushi, lacquer + -ol.]
(Elements & Compounds) a poisonous pale yellow liquid occurring in poison ivy and the lacquer tree
[from Japanese urushi lacquer + -ol2]
u•ru•shi•ol(ʊˈru ʃiˌɔl, -ˌɒl)
a catechol derivative that is the irritant in poison ivy and its allies.
[1910–15; < Japanese urushi lacquer]