urushiol

urushiol definition - medical

u·ru·shi·ol (o͝o-ro͞oˈshē-ôlˌ, -ōlˌ)

noun
A toxic substance constituting the active allergen of the irritant oil present in poison ivy, poison oak, and poison sumac.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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