poison oak

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English[edit]

poison oak leaves

Etymology[edit]

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

Noun[edit]

poison oak (usually uncountable, plural poison oaks)

  1. Any of the species of Toxicodendron with compound leaves having three oak-like leaflets, native to North America.

Hyponyms[edit]

Further reading[edit]