speiss

[spahys]
noun Metallurgy.
a product obtained in smelting certain ores, consisting of one or more metallic arsenides, as of iron or nickel.

Origin:
1790–1800; < German Speise literally, food

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speiss (spaɪs)
 
n
the arsenides and antimonides that form when ores containing arsenic or antimony are smelted
 
[C18: from German Speise food]

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Example sentences
If the charge is high in arsenic and/or antimony con- tent, a speiss layer will form under the matte.
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