Definition from Wiktionary, the free dictionary
See also: poison-ivy
- Any of three ivy-like species of Toxicodendron, known for their ability to cause an itching rash and blistering for most people, through urushiol, an oil that is a skin irritant.
- (ivy-like plant producing skin irritant): Toxicodendron orientale (Asian poison ivy), Toxicodendron radicans (eastern poison ivy), Toxicodendron rydbergii (western poison ivy)
one of several ivy-like urushiol-producing plants