poisonwood
noun
poi·son·wood ˈpȯi-zᵊn-ˌwu̇d 
: a tree (Metopium toxiferum) of the cashew family that is native to Florida and the West Indies and has compound leaves, greenish paniculate flowers, and orange-yellow fruits and produces a severely irritating sap
Example Sentences
Recent Examples on the Web Most of the fires set didn't harm wildlife or the firefighters who responded, save for some exposure to the irritant-containing shrub poisonwood, Gantt said. 
Scottie Andrew, CNN, 29 Apr. 2021 A reticulated python swallowed a man whole in Indonesia last month, but python attacks on humans are so rare that Hargrove’s biggest concern while hunting was poisonwood, whose sap causes blistering rashes. Jennifer Kay, The Seattle Times, 5 May 2017 A reticulated python swallowed a man whole in Indonesia last month, but python attacks on humans are so rare that Hargrove’s biggest concern while hunting was poisonwood, whose sap causes blistering rashes. Washington Post, 5 May 2017
Scottie Andrew, CNN, 29 Apr. 2021 A reticulated python swallowed a man whole in Indonesia last month, but python attacks on humans are so rare that Hargrove’s biggest concern while hunting was poisonwood, whose sap causes blistering rashes. Jennifer Kay, The Seattle Times, 5 May 2017 A reticulated python swallowed a man whole in Indonesia last month, but python attacks on humans are so rare that Hargrove’s biggest concern while hunting was poisonwood, whose sap causes blistering rashes. Washington Post, 5 May 2017 Word History
First Known Use
1756, in the meaning defined above
Medical Definition
poisonwood
noun
poi·son·wood ˈpȯiz-ᵊn-ˌwu̇d
: a caustic or poisonous tree of the genus Metopium (M. toxiferum) of Florida and the West Indies that has compound leaves, clusters of greenish flowers, and orange-yellow fruits