urushiol Hear it!

urushiol definition

uru·shiol (o̵̅o̅′ro̵̅o̅ s̸hē ôl′, o̵̅o̅ ro̵̅o̅′-; -ōl′)

noun

a poisonous, irritant liquid, CHO, present in poison ivy, poison sumac, etc.

Etymology: Jpn urushi, lac tree, lacquer + -ol: coined (1907) by Toshiyuki Mashima, who isolated it

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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