[n] a reflex that expels wind noisily from the stomach through the mouth
[n] (of volcanos) pouring out fumes or lava (or a deposit so formed)
\Er`uc*ta"tion\, n. [L. eructatio: cf. F. ['e]ructation.]
1. The act of belching wind from the stomach; a belch.
2. A violent belching out or emitting, as of gaseous or other matter from the crater of a volcano, geyser, etc.