noun: (medicine) Initialism of Bacillus of Calmette and Guérin (“Bacille Calmette-Guérin”)., a vaccine for tuberculosis developed by Albert Calmette and Camille Guérin
noun: (US, military slang) Initialism of birth control glasses. [(plural only, US, military slang) The brown-framed prescription eyeglasses issued to new recruits in the U.S. military, and perceived as notoriously unattractive.]
noun: (astronomy) Initialism of brightest cluster galaxy.
noun: (astronomy) Initialism of blue compact galaxy.
