B- may refer to:
*B-, a
blood type
A blood type (also known as a blood group) is a classification of blood, based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells (RBCs). These antigens may be proteins, carbohydrate ...
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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
Nigeria
The choice of gr ...
, an academic grade
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B − L
In high-energy physics, ''B'' − ''L'' (pronounced "bee minus ell") is the difference between the baryon number (''B'') and the lepton number (''L'').
Details
This quantum number is the charge of a global/gauge U(1) symmetry in so ...
, ('B minus L'), the difference between the baryon number (B) and the lepton number (L)
{{Disambiguation