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单词 nigre
释义

nigre

/ˈnʌɪɡə/
(also niger) Soap-making
noun
A dark-coloured solution of soap and impurities (colouring material, alkali, etc.) which settles out from the pure soap during the final stage of the manufacturing process.

Origin

Mid 19th century; earliest use found in Andrew Ure (1778–1857), chemist. Apparently from classical Latin nigr-, niger black.

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更新时间:2024/12/23 5:30:34