Definition of Yawning

1. Bad Bugs and Their Bites Slideshow
2. Heartburn: Foods to Eat and Avoid Slideshow
3. Understanding Multiple Sclerosis Slideshow

Yawning: Involuntary opening of the mouth with respiration, breathing first inward, then outward. Yawning is often caused by the power of suggestion. Repeated yawning may be a sign of drowsiness. It can also sometimes be a sign of depression.

Need help identifying pills and medications?
Use the pill finder tool on RxList.