misch metal
Concise Oxford English Dictionary © 2008 Oxford University Press:
misch metal /mɪʃ/
▶noun an alloy of cerium, lanthanum, and other rare-earth metals, used as an additive in various alloys.
– origin 1920s: from Ger. Mischmetall, from mischen ‘to mix’ + Metall ‘metal’.
'misch metal' also found in these Oxford entries:

