panopticon

['pæn'ɑptɪ,kɑn]

panopticon (n.): 1768, a type of optical instrument or telescope, from Greek pan "all" (see pan-) + optikon, neuter of optikos "of or for sight" (see optic). Later the name of a type of prison designed by Bentham (1791) in which wardens had a constant view of all inmates, and "a showroom" (1850).