NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,260 terms related to cancer and medicine.
We offer a widget that you can add to your website to let users look up cancer-related terms. Get NCI’s Dictionary of Cancer Terms Widget.
- varicose vein
- listen (VAYR-ih-kose vayn)
- A condition in which a vein, most often in the legs, becomes permanently enlarged, twisted, and painful. This may be caused by valves in the vein that don’t work properly or by weakness in the vein walls.