For Regurgitation we have terms and definitions in 4 topics. The topics are Dairy Production, Health, Horse Health and Medical.

Reversal of the natural direction in which contents flow through a tube or a cavity in the body. During rumination, rumen contents are regurgitated through the esophagus in the mouth for further mastication.
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Backward flow of blood caused by a defective heart valve.
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Involuntary return of undigested food to the mouth after swallowing; differs from vomiting in that it is a passive process (i.e., unaccompanied by the reflex, propulsive movements characteristic of vomiting).
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The backflow of fluid; can refer to food and drink flowing back up from the stomach into the mouth or blood flowing back into the heart through a defective heart valve
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