'Eructation' definitions:

Definition of 'eructation'

noun

(of volcanos) pouring out fumes or lava (or a deposit so formed) [syn: eruption, eructation, extravasation]

noun

A reflex that expels gas noisily from the stomach through the mouth [syn: belch, belching, burp, burping, eructation]

From: GCIDE

Eructation \Er`uc*ta"tion\, n. [L. eructatio: cf. F. ['e]ructation.]
1. The act of belching wind from the stomach; a belch. [1913 Webster]
2. A violent belching out or emitting, as of gaseous or other matter from the crater of a volcano, geyser, etc. [1913 Webster]