- a long surgical knife with a narrow blade
WordReference Random House Unabridged Dictionary of American English © 2026
bis•tou•ry
(bis′tə rē),USA pronunciation n., pl. -ries.
- a long, narrow surgical knife.
- Upper Italian bistorino, for Italian pistorino pertaining to Pistoia, a city famous for its cutlery
- French bistouri, Middle French bistorin
- 1745–50
Collins Concise English Dictionary © HarperCollins Publishers::
bistoury /ˈbɪstərɪ/ n ( pl -ries)