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basic slag

noun

chiefly British
: a slag low in silica and high in base-forming oxides that is used in the basic process of steelmaking and that is subsequently useful as a fertilizer

Word History

First Known Use

1852, in the meaning defined above

Time Traveler
The first known use of basic slag was in 1852

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Cite this Entry

“Basic slag.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/basic%20slag. Accessed 29 Nov. 2025.

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