B-side

B-side |ˈbi ˌsaɪd | ▶noun the less important side of a pop single record.

B-side

B-side ▶noun the side of a pop single regarded as the less important one.

B-side

B́ -s ì de 名詞 C ｟やや古 ｠(レコードの )B面 (の曲 ).