urushiol

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urushiol

 [u-roo´she-ol]
the toxic irritant principle of poison ivy and related plants.

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]

urushiol

/uru·shi·ol/ (u-roo´she-ol) the toxic irritant principle of poison ivy and various related plants.

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.

urushiol

[əro̅o̅′shē·ôl]
a toxic resin in the sap of certain plants of the genus Rhus, such as poison ivy, poison oak, and poison sumac, that produces allergic contact dermatitis in many people.

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]

urushiol

the toxic irritant principle of poison ivy and various related plants.