Pterocles orientalis, a bird in the sandgrouse family.

plural of black-throated diver

plural of optical black hole

A phenomenon in which slow light is passed through a Bose-Einstein condensate that is itself spinning faster than the local speed of light within to create a vortex capable of trapping the light behind an event horizon, just as a gravitational black hole would.

plural of American black bear

A Black Forest gâteau

Pica hudsonia, a magpie native to North America.

Synonym of Black Turtle

Synonym of Black Turtle of the North

(economics) The impact of a highly improbable occurrence on the economy.