poisonwood \ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷\noun 1.: a caustic or poisonous tree (Metopium toxiferum) of the family Anacardiaceae occurring in Florida and the West Indies and having compound leaves, greenish paniculate flowers, and orange-yellow fruits 2.: crabwood 3.: poison sumac 4.: manchineel