ignimbritePronunciation: /ˈɪgnɪmbrʌɪt/Definition of ignimbrite noun [mass noun] Geology a volcanic rock consisting essentially of pumice fragments, formed by the consolidation of material deposited by pyroclastic flows. Origin: 1930s: from Latin ignis 'fire' + imber, imbr- 'shower of rain, storm cloud' + -ite1ignimbrite in other Oxford dictionaries Definition of ignimbrite in the US English dictionary
