Pathology (noun)

1. The study of the nature, cause, and effects of diseases.
2. The branch of medicine concerned with the diagnosis and treatment of disease.
3. The abnormal or diseased conditions of a part or organ of the body.

Origin:

From the greek words pathos (suffering) and logos (study of), meaning the study of disease.

Examples:

1. Pathology is a branch of medicine that deals with the study of the cause and development of diseases.
2. He is a pathologist and he specializes in the pathology of cancer.
3. The pathology report showed that the tumor was malignant.
4. He is studying pathology in order to become a pathologist.
5. The pathology lab was able to determine the exact cause of death.