B'

B' (B + apostrophe) may represent:


 * Bʼ (B + modifier apostrophe), symbol for palatalised b in Slavic notation
 * B′ (B + prime), symbolising bottomness in particle physics
 * Β′ or β′ (Beta prime)

It is not to be confused with:
 * B́ (B + acute accent)
 * Ḃ (B + overdot)
 * Bʻ (B + ʻokina)
 * Bꞌ (B + saltillo)
 * Bʾ (B + right half ring)
 * Bʿ (B + left half ring)