The univalent arsenic group (CH3 )2 As.
A poisonous oil, As2 (CH3 )4 , with an obnoxious garlicky odor.
The radical As(CH3)2, composed of arsenic and methyl: its compounds are poisonous and foul-smelling.
A poisonous, colorless liquid, As2(CH3)4, with an offensive odor: it is a polymer of this radical.
Origin of cacodyl
Greek kakōdēs bad-smelling (kakos bad kakka- in Indo-European roots) (-ōdēs -smelling) (from ozein ōd- to smell) –yl