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"belching," 1530s, from Latin eructationem (nominative eructatio) "a belching forth," noun of action from past participle stem of eructare "to belch forth, vomit," from ex- "out" (see ex-) + ructare "to belch," from PIE *reug- "to belch" (cf. Lithuanian rugiu "to belch," Greek eryge, Armenian orcam), probably of imitative origin. Related: Eruct; eructate.
eructation e·ruc·ta·tion (ĭ-rŭk-tā'shən, ē'rŭk-)
The act or an instance of belching.