ferrosilicon

noun
fer·ro·sil·i·con | \ˌfer-ō-ˈsi-li-kən, -lə-ˌkän\

Definition of ferrosilicon 

: an alloy of iron and silicon containing 15 to 95 percent silicon and used for deoxidizing molten steel and making silicon steel and high-silicon cast iron

First Known Use of ferrosilicon

1874, in the meaning defined above

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The first known use of ferrosilicon was in 1874

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