English Explanatory Dictionary

poison oak

English dictionary entry

Meanings

noun

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

Word forms

poison oak poison oaks

Etymology

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

Related words

leaves of three, let it be poison ivy poison sumac

Derived words

western poison oak Atlantic poison oak

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