urushiol

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urushiol

 [u-roo´she-ol]
the toxic irritant principle of poison ivy and related plants.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

u·ru·shi·ol

(ū-rū'shē-ōl),
A mixture of nonvolatile hydrocarbons, derivatives of catechol with unsaturated C15 or C17 side chains, constituting the active allergen of the irritant oil of poison ivy, Toxicodendron radicans, poison oak, T. diversilobum, and the Asiatic laquer tree, T. verniciferum.
[Jap. urushi, lac, + L. oleum, oil]
Farlex Partner Medical Dictionary © Farlex 2012

urushiol

(o͝o-ro͞o′shē-ôl′, -ōl′, -ŏl′)
n.
A toxic substance composed of catechol derivatives 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, from which a durable lacquer is obtained.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

ur·u·shi·ol

(ū-rū'shē-ōl)
A mixture of nonvolatile hydrocarbons, constituting the active allergen of the irritant oil of poison ivy, Toxicodendron radicans, poison oak, T. diversilobum, and the Asiatic laquer tree, T. verniciferum.
[Jap. urushi, lac, + L. oleum, oil]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012