misch metal

a pyrophoric alloy, containing approximately 50 percent cerium and 45 percent lanthanum, made from a mixture of various rare-earth chlorides by electrolysis.

1920–25; < German Mischmetall, equivalent to misch(en) to mix + Metall metal

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World English Dictionary
misch metal (mɪʃ)
an alloy of cerium and other rare earth metals, used esp as a flint in cigarette lighters
[C20: from German Mischmetall, from mischen to mix]

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