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)
This is a list of grading systems used by countries of the world, primarily within the fields of secondary education and university education, organized by continent with links to specifics in numerous entries.
Africa
Angola
The grading sy ...
, 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