Medical Dictionary


adj ma·lig·nant \mə-ˈlig-nənt\

Medical Definition of MALIGNANT

:  tending to produce death or deterioration <malignant malaria>; especially :  tending to infiltrate, metastasize, and terminate fatally <malignant tumors>—compare benign 1
:  of unfavorable prognosis :  not responding favorably to treatment <psychotic reactions with a malignant trend>
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