B-side meaning

bēsīd
The reverse side of a phonograph record, especially a single.
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An extra recording released along with a featured performance, as on a CD.
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The reverse side of a phonograph record, especially of a vinyl single.
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Any song included on a compact disc single, besides the first song (the A-side).
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Origin of b-side

  • From the B on the record's label

    From American Heritage Dictionary of the English Language, 5th Edition