We found 5 dictionaries that define the word malignant tumors:

General (3 matching dictionaries)

1. malignant tumors: Merriam-Webster
2. malignant tumors: Vocabulary.com
3. Malignant tumors: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)

4. Malignant tumors: Encyclopedia

Medicine (1 matching dictionary)

5. Malignant tumors: Medical dictionary

(Note: See malignant_tumor as well.)

Definitions from WordNet (malignant tumor) ▸ noun:  a tumor that is malignant and tends to spread to other parts of the body ▸ Also see malignant_tumor Opposite: benign tumors, noncancerous tumors, harmless growths ▸ Words similar to malignant tumors ▸ Usage examples for malignant tumors ▸ Idioms related to malignant tumors ▸ Wikipedia articles (New!) ▸ Words that often appear near malignant tumors ▸ Rhymes of malignant tumors ▸ Invented words related to malignant tumors