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.

plural of B-girl

(biochemistry) Any member of the vitamin B complex.

(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.

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

(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.

plural of B cell

(aviation) Initialism of Automatic dependent surveillance – broadcast. (automated broadcast of aircraft location information from satellite navigation systems to air traffic control networks)