Medical Dictionary
malignant
malignant
adj ma·lig·nant \mə-ˈlig-nənt\
Definition of MALIGNANT
1
: tending to produce death or deterioration <malignant malaria>; especially : tending to infiltrate, metastasize, and terminate fatally <malignant tumors>—compare benign 1
2
: of unfavorable prognosis : not responding favorably to treatment <psychotic reactions with a malignant trend>
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