Poison oak

noun

Definitions

Noun
  1. 1
    Any of the species of Toxicodendron with compound leaves having three oak-like leaflets, native to North America. uncountable, usually
  2. 2
    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 wordnet
  3. 3
    dermatitis resulting from contact with a poison oak plant wordnet

Etymology

Its leaves resemble those of the true oaks, and the leaves and twigs contain urushiol, which can cause allergic reactions.

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