NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,893 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 (proh-LAK-tin)
- A hormone that is made by the pituitary gland (a pea-sized organ in the center of the brain). Prolactin causes a woman’s breasts to make milk during and after pregnancy, and has many other effects in the body.