Poison Oak Definition
noun
Poison sumac or any of various poison ivy plants (esp. Rhus toxicodendron and R. diversiloba)
Webster's New World
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.
American Heritage Medicine
Synonyms:
- poison mercury
- toxicodendron-radicans
- rhus-radicans
- markweed
- poison-ivy
Other Word Forms of Poison Oak
Noun
Singular:
poison oak
Plural:
poison oaks
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