poison oak

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Related to poison oaks: poison ivy, poison sumac

poison oak

n.
1. Either of two plants, Toxicodendron pubescens, a shrub of the southeast United States, or T. diversilobum, a shrub or vine of western North America, having compound leaves with three lobed or toothed leaflets, and causing a rash on contact.
3. A skin rash caused by contact with one of these plants.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

poison oak

n
1. (Plants) 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 sumach1
2. (Plants) (not in technical use) another name for poison ivy
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

poi′son oak′


n.
either of two North American shrubs of the cashew family, Rhustoxicodendron, of the eastern U.S., or R.diversiloba, of the Pacific coastal area, with leaves resembling those of poison ivy: may cause allergic dermatitis when touched.
[1735–45, Amer.]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.poison oak - dermatitis resulting from contact with a poison oak plant
Rhus dermatitis - contact dermatitis resulting from contact with plants of the genus Toxicodendron
2.poison oak - climbing plant common in eastern and central United States with ternate leaves and greenish flowers followed by white berriespoison oak - climbing plant common in eastern and central United States with ternate leaves and greenish flowers followed by white berries; yields an irritating oil that causes a rash on contact
genus Toxicodendron, Toxicodendron - in some classifications: comprising those members of the genus Rhus having foliage that is poisonous to the touch; of North America and northern South America
poisonous plant - a plant that when touched or ingested in sufficient quantity can be harmful or fatal to an organism
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations

poison oak

n (bot) roble venenoso
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
References in classic literature ?
It seemed as if all local varieties of trees and vines had conspired to weave the leafy roof--maples, big madronos and laurels, and lofty tan-bark oaks, scaled and wrapped and interwound with wild grape and flaming poison oak. Saxon drew Billy's eyes to a mossy bank of five-finger ferns.