scalpel

from WordNet (r) 3.0 (2006)

scalpel
    n 1: a thin straight surgical knife used in dissection and
         surgery

from The Collaborative International Dictionary of English v.0.48

Scalpel \Scal"pel\ (sk[a^]l"p[e^]l), n. [L. scalpellum, dim. of
   scalprum a knife, akin to scalpere to cut, carve, scrape: cf.
   F. scalpel.] (Surg.)
   A small knife with a thin, keen blade, -- used by surgeons,
   and in dissecting.
   [1913 Webster]