misch metalPronunciation: /mɪʃ/Definition of misch metal noun [mass noun] an alloy of cerium, lanthanum, and other rare earth metals, used as an additive in various alloys, e.g. in flints for cigarette lighters. Origin: 1920s: from German Mischmetall, from mischen 'to mix' + Metall 'metal'misch metal in other Oxford dictionaries Definition of misch metal in the US English dictionary