E number (disambiguation)

E numbers are food additive codes.

E number or E code may also refer to:

e (mathematical constant), the base of the natural logarithm
E notation, the base-10 exponential notation
International E-road network, a numbering system for roads in Europe
External Cause of Injury Codes, codes used to define the mechanism of death or injury
E-numbers in physics, the elements of a Clifford algebra in Arthur S. Eddington's "Fundamental theory"

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