Confused and have questions? We’ve got answers. With Chegg Study, you can get step-by-step solutions to your questions from an expert in the field. If you rather get 1:1 study help, try 30 minutes of free online tutoring with Chegg Tutors.


From Biology-Online Dictionary | Biology-Online Dictionary
Jump to: navigation, search


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.

Origin: Jap. Urushi, lac, _ L. Oleum, oil