eruc·ta·tion \ə̇ˌrəkˈtāshən, (ˌ)ēˌr-\noun (-s) Etymology: Latin eructation-, eructatio, from eructatus + -ion-, -io -ion 1.: the act of belching gas from the stomach : belch 2.: a violent belching out or emitting (as of gaseous or other matter from the crater of a volcano) 3.: something that is emitted by belching