poison oak
either of two shrubs, Rhus toxicodendron, of the eastern United States, or R. diversiloba, of the Pacific coast of North America, resembling poison ivy and causing severe dermatitis when touched by persons sensitive to them.
Origin of poison oak
1- Also called poison ivy.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use poison oak in a sentence
The true poison oak is the Rhus diversiloba of the Western States.
Some Constituents of the Poison Ivy Plant: (Rhus Toxicodendron) | William Anderson SymeThe sun had not yet climbed the wooded ridges beyond poison oak Ranch.
The Heritage of the Hills | Arthur P. HankinsJust because we use a poison-oak leaf for our brand—why, that's what got 'em to callin' us the Poison Oakers.
The Heritage of the Hills | Arthur P. HankinsThe poison oak had turned from green to brilliant red, and now was dark-green once more.
The Heritage of the Hills | Arthur P. HankinsAnd—and when we're—married, you won't take me away from the poison oak Country, will you, dear!
The Heritage of the Hills | Arthur P. Hankins
British Dictionary definitions for poison oak
either of two North American anacardiaceous shrubs, Rhus toxicodendron or R. diversiloba, that are related to the poison ivy and cause a similar rash: See also sumach (def. 1)
(not in technical use) another name for poison ivy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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