BLACK VOMIT
Black" vom"it. (Med.)

Defn: A copious vomiting of dark-colored matter; or the substance so discharged; — one of the most fatal symptoms in yellow fever.

BLACK WASH; 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.

BLACKWATER STATE
Black"wa`ter State.

Defn: Nebraska; — a nickname alluding to the dark color of the water of its rivers, due to the presence of a black vegetable mold in the soil.

BLACKWOOD
Black"wood, n.

Defn: A name given to several dark-colored timbers. The East Indian black wood is from the tree Dalbergia latifolia. Balfour.