ˈkäkəˌdil noun
( -s )
Etymology: International Scientific Vocabulary cacod- (from Greek kakōdēs ill-smelling, from kak- cac- + -ōdēs, akin to ozein to smell) + -yl; originally formed as German kakodyl — more at odor
1. : an arsenical radical As(CH 3 ) 2 whose compounds are noted for their vile smell and poisonous properties
2. : a colorless poisonous liquid compound As 2 (CH 3 ) 4 consisting of two cacodyl radicals and having an offensive odor