Definition of bistoury in English:
 bistoury
nounPlural bistouries ˈbɪstʊriˈbɪstəri
A surgical knife with a long, narrow, straight or curved blade.
 Example sentencesExamples
-  The cutting blade 1 of the bistoury and the mechanism for fitting it in the handle are known and therefore they are not described herein.
 -  It is necessary to use all possible tools to aid the patient, because it is clear that we cannot solve everything with bistouries or tablets.
 -  The material collected was analyzed under optical microscope, and dissected with the help of 2 bistouries to liberate the spermatozoa from the tissue.
 -  Everything was recorded: Félix cut twice with the bistoury and eight times with scissors.
 -  The instruments which he originally used were more often the bistoury or scalpel, although the clarinet was not absent in his life.
 
Origin
  
Mid 18th century: from French bistouri, originally bistorie 'dagger', of unknown origin.