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Meaning of arsphenamine

ars•phen•a•mine

Pronunciation: (ärs-fen'u-mēn", -min), [key]
— n. Pharm.
  1. a yellow, crystalline powder, CHNOAs&multiplydot;2HCl&multiplydot;2HO, formerly used to treat diseases caused by spirochete organisms, esp. syphilis and trench mouth: first known as “606.”
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.