NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,138 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.
- listen (SY-nus)
- A cavity, space, or channel in the body. Examples include hollow spaces in the bones at the front of the skull, and channels for blood and lymph. Sinuses may also be found in the heart, brain, kidney, and other organs.