Main Entry: cac·o·dyl·ic acid

Pronunciation: \ˌka-kə-ˈdi-lik-\

Function: noun

Etymology: German Kakodyl the radical As(CH₃)₂, from Greek kakōdēs foul-smelling, from kak- + -ōdēs (akin to Greek ozein to smell) — more at odor

Date: 1850

: a toxic crystalline compound of arsenic C₂H₇AsO₂ used especially as an herbicide