half-integer

noun
plural half-integers

Definition of half-integer 

: any number of the form x/2, where x is any odd integer Particles whose spin is a half-integer of h, on the other hand, are fermions satisfying the Pauli exclusion principle; no two particles can have the same state.— Qimiao Si et al., Science, 3 Sept. 2010

Note: A half of an even integer is considered an integer. A half-integer is the result of a half of an odd integer.

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Other Words from half-integer

half-integral adjective
All the particles that we like to think of as “real” particles, like protons, neutrons and electrons, have spin which is half-integral—1/2, 3/2, 5/2 and so on. — John Gribbin, The Search For Superstrings, 1998

First Known Use of half-integer

1897, in the meaning defined above

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