pll

/P L/
noun
  1. 1

    (electronics) Initialism of phase-locked loop. [(electronics) an electronic circuit used to lock an oscillator in phase with an arbitrary input signal]

  2. 2

    (Rubik's Cube) Initialism of permutation of the last layer; after OLL, the rearrangement of the last layer of cubies so that they are in their right places.