Turdus atrogularis, a migratory Asian thrush with a black throat

(computing, informal) The situation where a computer monitor displays a correct screen image when first switched on, but then quickly blanks out, typically associated with capacitor problems.

Synonym of black birch

(mathematics, physics) A mathematical formulation for a black hole which does not contain a singularity. The environment outside the event horizon is the same as other formulations for black holes.

plural of black bag job

(informal) A covert or clandestine entry into a building etc. to obtain information for an intelligence operation.

plural of black bag operation

Synonym of black bag operation

plural of black-veined white

A large species of butterfly, Aporia crataegi, native to Europe and parts of Asia.