Definition of "arsenical"

arsenical

/ɑːˈsɛnɪkl̩/

adjective
comparative more arsenical, superlative most arsenical
1. Of or pertaining to, or containing, arsenic.
noun
plural arsenicals
1. Any drug or other substance containing arsenic.
  Quotations
  Thus Mercury cures the holes which it has provoked and other Arsenicals do likewise.
  1999, Paracelsus, “Opus Paramirum”, in Nicholas Goodrick-Clarke, transl., Essential Readings, North Atlantic Books, page 95