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poison oak

noun
🔊/ˌpɔɪzn ˈəʊk/
🔊/ˌpɔɪzn ˈəʊk/
[uncountable]
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  1. a North American bush that causes painful spots on the skin when you touch it栎叶漆，毒栎（原产于北美，接触后会引起皮炎）