panopticon

/P AE1 N AA0 P T IH1 K AH0 N/
noun
  1. 1

    A type of prison where all the cells are visible from the center, particularly if it is not possible for someone in a cell to know if they are being watched.

  2. 2

    A room for the exhibition of novelties.

Source: https://en.wiktionary.org/wiki/panopticon