Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun poison_oak

2 senses of poison oak

Sense 1
poison oak -- (dermatitis resulting from contact with a poison oak plant)
       => Rhus dermatitis -- (contact dermatitis resulting from contact with plants of the genus Toxicodendron)

Sense 2
poison ivy, markweed, poison mercury, poison oak, Toxicodendron radicans, Rhus radicans -- (climbing plant common in eastern and central United States with ternate leaves and greenish flowers followed by white berries; yields an irritating oil that causes a rash on contact)
       => poisonous plant -- (a plant that when touched or ingested in sufficient quantity can be harmful or fatal to an organism)