poison oak

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Related to poison oaks: poison ivy, poison sumac

poison oak:

see poison ivypoison ivy,
 poison oak,
and poison sumac,
woody vines and trailing or erect shrubs of the family Anacardiaceae (sumac family), native to North America.
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poison oak

[′pȯiz·ən ′ōk]
(botany)
Any of several bushy poison ivy plants or shrubby poison sumacs.