cat's silver en · NOUN
Etymology
Calque of German Katzensilber
Meanings
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(archaic, uncountable) mica
Another variety of mica in spangles of a yellowish gold, or whitish silver colour, is known all over the world, by the ridiculous names of cat's gold, or cat's silver.
1827, Universal Geography: Or A Description of All Parts of the World, page 98: