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Definition of Oscitation

Oscitation: The act of yawning, the involuntary opening of the mouth with respiration, breathing first inward, then outward.

Yawning is often caused by suggestion. Repeated yawning is commonly a sign of drowsiness. It can also sometimes be a sign of depression.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=13067
Last Editorial Review: 6/14/2012

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