pan·op·ti·con 
(păn-ŏptĭ-kŏn′)
(păn-ŏptĭ-kŏn′)n.
A hypothetical prison proposed by Jeremy Bentham, having circular tiers of cells surrounding a central observation tower.
[Earlier, a peepshow device used to exhibit pictures : PAN- + Greek optikon, neuter of optikos, optic; see OPTIC.]