blackwash

Black" wash` or Black"wash, n. 1. (Med.) Defn: A lotion made by mixing calomel and lime water. 2. A wash that blackens, as opposed to whitewash; hence, figuratively, calumny. To remove as far as he can the modern layers of black wash, and let the man himself, fair or foul, be seen. C. Kingsley.

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