Medical Dictionary


noun im·pac·tion \im-ˈpak-shən\

Medical Definition of IMPACTION

:  the act of becoming or the state of being impacted; specifically :  lodgment or an instance of lodgment of something (as a tooth or feces) in a body passage or cavity
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