Imperfect or painful digestion; not a disease in itself but symptomatic of other diseases or disorders.

It is marked by vague abdominal discomfort, a sense of fullness after eating, heartburn, nausea and vomiting, and loss of appetite.

Dyspepsia (ingestion) marked by a sensation of abdominal fullness; gaseous dyspepsia: The condition of flatulent dyspepsia may produce an excessive eructation of gas, better known as burping or belchingm, that means casting up wind (expelling air noisily) from the stomach through the mouth.