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poison oak
(redirected from poison oaks)

    Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson 0.04 sec.
poison oak /poi·son oak/ (ok) Rhus diversiloba or R. toxicodendron.
poison oak
n.
1. Either of two shrubs, Rhus toxicodendron of the southeast United States or R. diversiloba of western North America, related to poison ivy and causing a rash on contact.
2. See poison ivy.
poison oak A type of hypersensitivity dermatitis caused by Rhus diversiloba–western poison oak, and R quercifolia–eastern poison oak. See Poison ivy.


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