01 n. A lotion made by mixing calomel and lime water.
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1.
A lotion made by mixing calomel and lime water.(Med.)
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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.