Note that the malignant cells are invading and destroying the muscle fibres of the heart.
In this way they give rise to a malignant new growth.
A malignant attitude will turn others away from friendship
Malaria is widely prevalent, and in some years, after a wet spring, assumes a malignant character.
The evil queen was portrayed by the author as malignant and powerful.
In medical science, the term "malignant" is applied to a particularly virulent or dangerous form which a disease may take, or to a tumour or growth of rapid growth, extension to the lymphatic glands, and recurrence after operation.
I desperately hoped that the cancerous tumor was not malignant.
Amber hoped that her son did not show his malignant side at his new school.
Strong sulphuric acid is occasionally used as a caustic to venereal sores, warts and malignant growths.
Malignant tumors are difficult to eradicate because they can spread uncontrollably.