Medical Dictionary


vt coun·ter·act \ˌkant-ə-ˈrakt\

Medical Definition of COUNTERACT

:  to make ineffective or restrain or neutralize the usually ill effects of by an opposite force <vitamin K counteracts the effects of warfarin>
coun·ter·ac·tion \-ˈrak-shən\ noun


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