poison oak
From Longman Dictionary of Contemporary EnglishRelated topics: Plantspoison oakˌpoison ˈoak noun [uncountable] HBPa North American plant with leaves similar to an oak tree’s, that makes your skin hurt and itch if you touch itExamples from the Corpuspoison oak• Fire officials said bee stings and poison oak were the most serious problems.• There were casualties: One soldier burned out his chain saw; another got poison oak.