/kak"euh dil/
adj.
1. containing the cacodyl group.
n.
2. an oily, slightly water-soluble, poisonous liquid compound composed of two cacodyl groups, (CH 3 ) 2 As-As(CH 3 ) 2 , that has a vile, garliclike odor and that undergoes spontaneous combustion in dry air.
[ 1840-50; kakód ( es ) ill-smelling ( kak ( o )- CACO- + -od- smell + -es adj. suffix) + -YL ]