B- may refer to:
*B-, a
blood type
A blood type (also known as a blood group) is based on the presence and absence of antibody, antibodies and Heredity, inherited antigenic substances on the surface of red blood cells (RBCs). These antigens may be proteins, carbohydrates, glycop ...
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B- (grade), an academic grade
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B − L
In particle physics, ''B'' − ''L'' (pronounced "bee minus ell") is a quantum number which is the difference between the baryon number () and the lepton number () of a quantum system.
Details
This quantum number is the charge of ...
, ('B minus L'), the difference between the baryon number (B) and the lepton number (L)
{{Disambiguation