cacodyl
  二甲胂
  cac·o·dyl /ˈkækəˌdɪl/ 名詞
  四甲二砷,卡可基,二甲胂基,雙二甲胂
  Cac·o·dyl n.  Chem. Alkarsin; a colorless, poisonous, arsenical liquid, As2(CH3)4, spontaneously inflammable and possessing an intensely disagreeable odor. It is the type of a series of compounds analogous to the nitrogen compounds called hydrazines. [Written also cacodyle, and kakodyl.]
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  cacodyl
       n 1: a poisonous oily liquid with a garlicky odor composed of 2
            cacodyl groups; undergoes spontaneous combustion in dry
            air [syn: tetramethyldiarsine]
       2: the univalent group derived from arsine [syn: cacodyl group,
           cacodyl radical, arsenic group]