From Longman Dictionary of Contemporary EnglishB-sideB-side /ˈbiː saɪd/ noun [countable] 1 TCRthe side of a record that has the less well-known song on it2 the song on this side of the record
Examples from the Corpus
B-side• What other art form can do that, trace a masterpiece back to some dodgy Beatles' B-side?• Whereas the original boasted an eerie aura, the remix merely sounds like a half-hearted run through an old New Order B-side.• Here, however, I've got no complaint, thanks to the mad Steely and Clevie dub on the B-side. 