A simple form of gunpowder, consisting of a mixture of saltpetre, charcoal, and sulfur.

plural of black friar

A member of the religious order of the Dominicans.

(slang) A police van for transporting prisoners.

(calligraphy) A highly calligraphic Western European script style used from approximately 1150.

A tree native to eastern North America, Nyssa sylvatica. / Eucalyptus aggregata, of south eastern Australia / Eucalyptus ovata, of south eastern Australia

plural of black hole

Alternative form of men in black (“covert government operatives”)

(US) Any one of a series of laws, passed before the American Civil War, sharply discriminating against free blacks who wished to emigrate to a northern state and become citizens there.

(informal, idiomatic) Raw petroleum; crude oil. / Black pepper, in the context of being a historically valuable spice.