(slang) A police van for transporting prisoners.

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

A small passerine bird, Phoenicurus ochruros, from south and central Europe

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

A member of the religious order of the Dominicans.

plural of black friar

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

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

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