Definition of photino in English:

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Pronunciation: /fōˈtēnō/

noun (plural photinos)

The hypothetical supersymmetric counterpart of the photon, with spin − 1/2.
Example sentences
  • The photon, a boson, has a fermion partner called the photino.
  • Also, the next vibration of the string includes a photino or particle which may make up most of the dark matter in the Universe.
  • Another popular notion is supersymmetry, which predicts that all particles have shadowy ‘superpartners,’ with names such as selectrons, smuons and photinos.


1970s: from photon + -ino from neutrino.

For editors and proofreaders

Syllabification: pho·ti·no

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