#surgical_knife  a very sharp knife used in surgery
  supertype:  #knife  #surgical_instrument
  subtype:  #catling  a long double-edged knife used for amputations
  subtype:  #lancet__lance  a surgical knife with a pointed double-edged blade; used for punctures and small incisions
  subtype:  #scalpel  a thin straight surgical knife used in dissection and surgery

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