Tox·i·co·den·dron noun \ˌtäk-si-kō-ˈden-ˌdrän\
: a genus of shrubs and trees of the cashew family (Anacardiaceae) that includes poison ivy and related plants when they are split off from the genus Rhus
Seen & Heard
What made you want to look up Toxicodendron? Please tell us where you read or heard it (including the quote, if possible).