dichlorophenarsine
noun
di·chlo·ro·phen·ar·sine
| \ -fen-ˈär-ˌsēn, -ˌär-ˈsēn
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Medical Definition of dichlorophenarsine
: an arsenical formerly used in the form of its white powdery hydrochloride C6H6AsCl2NO·HCl in the treatment of syphilis