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

1 sense of markweed

Sense 1
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)