ETYM Latin malignus, for maligenus, i. e., of a bad kind or nature; malus bad + the root of genus birth, race, kind: cf. French malin, masc., maligne, fem. Related to Malice, Gender, Benign, Malignant.
Evil or harmful in nature or influence.
ETYM Latin malignans, -antis, p. pr. of malignare, malignari, to do or make maliciously. Related to Malign, Benignant.
(Pathology) Characterized by progressive and uncontrolled growth (especially of a tumor).
Term used to describe a cancerous growth. It is also applied to any condition that could kill if untreated (as in malignant hypertension).