malignant


ma·lig·nant

adjective \mə-ˈlig-nənt\

medical : very serious and dangerous : tending or likely to grow and spread in a rapid and uncontrolled way that can cause death

: very evil

Full Definition of MALIGNANT

1
a obsolete :  malcontent, disaffected
b :  evil in nature, influence, or effect :  injurious
c :  passionately and relentlessly malevolent :  aggressively malicious
2
:  tending to produce death or deterioration <malignant malaria>; especially :  tending to infiltrate, metastasize, and terminate fatally <a malignant tumor>
ma·lig·nant·ly adverb

Examples of MALIGNANT

  1. a highly malignant form of cancer
  2. a powerful and malignant influence

Origin of MALIGNANT

Late Latin malignant-, malignans, present participle of malignari
First Known Use: circa 1545

Rhymes with MALIGNANT

ma·lig·nant

adjective \mə-ˈlig-nənt\   (Medical Dictionary)

Medical 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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