NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,798 terms related to cancer and medicine.
Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.
- listen (PROK-sih-mul)
- In medicine, refers to a part of the body that is closer to the center of the body than another part. For example, the knee is proximal to the toes. The opposite is distal.