poison oak

noun

Definition of poison oak

  1. 1 :  any of several plants related to poison ivy and producing an oil with similar irritating properties: such asa :  a bushy plant (Toxicodendron diversilobum synonym Rhus diversiloba) of the Pacific coastb :  a bushy plant (Toxicodendron toxicarium synonym Rhus toxicodendron) chiefly of the southeastern U.S.

  2. 2 :  poison ivy 1a

1739

First Known Use of poison oak

1739


POISON OAK Defined for English Language Learners

poison oak

noun

Definition of poison oak for English Language Learners

  • : a common bush in the western U.S. that causes a very itchy and painful rash on your skin if you touch it


POISON OAK Defined for Kids

poison oak

noun

Definition of poison oak for Students

  1. :  a bush related to poison ivy that can cause an itchy painful rash when touched


Medical Dictionary

poison oak

play
noun \-ˈōk\

Medical Definition of poison oak

  1. 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 coastb:  a bushy plant (R. toxicodendron synonym T. pubescens) of the southeastern United States

  2. 2:  poison ivy 1a

  3. 3:  a skin rash produced by poison oak


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