What it means
The paranasal sinuses sit behind the forehead, cheeks and eyes and open into the nose. They lighten the skull and warm and moisten the air. Inflamed sinuses are sinusitissy-nuh-SY-tisInflammation of the lining of the sinuses, the air spaces around the nose.sinus sinus-itis inflammationFull entry . The word is also used in "sinus rhythm," a heartbeat started by the sinoatrial node, and for a channel draining pus from an infection.
At a glance
| Spanish | seno |
|---|---|
| Also written | sinuses |