(film) A low-budget motion picture, especially one with poor production values.

(immunology) A lymphocyte, developed in the bursa of birds and the bone marrow of other animals, that produces antibodies and is co-responsible for the immune system.

An alternative approach adopted when one's original plan does not succeed.

The reverse side of a cassette tape or a phonograph record, especially a vinyl single, often containing songs not considered for airplay.

(biochemistry) Any member of the vitamin B complex.

Initialism of British Central Africa., as overprinted on stamps of Rhodesia in 1891.

(UK, historical) Initialism of British Military Administration., used in the late 1940s as an overprint on certain stamps of Great Britain used in British offices in Eritrea and Tripolitania.

plural of B-girl

(slang) A male who performs b-boying or breaking, commonly called breakdance; a breaker. / (slang) A male member of the hip-hop subculture.

(slang) To breakdance.