noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A woody vine plant in the family Anacardiaceae (Toxicodendron radicans or Rhus toxicodendron), well-known for its ability to produce urushiol, a skin irritant that causes an itching rash for most people. uncountable

Etymology

From poison + ivy.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.