Medical Dictionary

poison oak

noun \-ˈōk\

Medical Definition of POISON OAK

1
:  any of several plants included in the genus Rhus or sometimes in the genus Toxicodendron that produce an irritating oil like that of poison ivy: a :  a bushy plant (R. diversiloba synonym T. diversilobum) of the Pacific coast b :  a bushy plant (R. toxicodendron synonym T. pubescens) of the southeastern United States
2
:  poison ivy 1a
3
:  a skin rash produced by poison oak
May 06, 2015
dauntless Hear it
fearless or very brave
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears