Black" wash` (?) ∨ Black"wash, n.
1. Med.
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.
© Webster 1913.