Medical Dictionary


noun \ˈnīf\
plural knives \ˈnīvz\

Medical Definition of KNIFE

:  any of various instruments used in surgery primarily to sever tissues: as a :  a cutting instrument consisting of a sharp blade attached to a handle b :  an instrument that cuts by means of an electric current
:  surgery 3—usually used in the phrase under the knife <went under the knife yesterday> <was afraid of the knife>
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears