title: Singlet
text: # Singlet
  
  Singlet may refer to:
  
  * singlet state, in theoretical physics, a quantum state with zero spin
  * Singlet fission, in molecular photophysics
  * in spectroscopy, an entity appearing as a single peak; see NMR spectroscopy
  * in optics, a single lens element, the building blocks of lens systems; see lens (optics)
  * a one-piece collarless garment, also known as a sleeveless shirt or vest
     * wrestling singlet, a one-piece garment specific to wrestling
  * BID/60, a British encryption machine
  * Singlet oxygen, the common name used for an excited form of molecular oxygen
  