Cachou de Laval

noun

Ca·​chou de La·​val

-dələˈval

: a direct dark brown dye for cotton obtained as the first sulfur dye by heating organic materials (as sawdust or bran) with sulfur and sodium sulfide

Word History

Etymology

French, from Laval, city in France, place of its first manufacture

First Known Use

1879, in the meaning defined above

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