Pyrosis: A technical term for what is popularly called heartburn, a burning sensation in the upper abdomen. In many languages there is a technical term such as pyrosis and a popular term for the same phenomenon. For example, pyrosis is popularly known in French as brûlure epigastrique and in Spanish as ardor de estómago. Pyrosis is the Greek word meaning burning.
Last Editorial Review: 1/25/2017