a circular prison with cells distributed around a central surveillance station; proposed by Jeremy Bentham in 1791 | a part of a structure having some specific characteristic or function |
an area where everything is visible | the extent of a 2-dimensional surface enclosed within a boundary |
| a part of an animal that has a special function or is supplied by a given artery or nerve |
| a subject of study |
| a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography) |
| a particular environment or walk of life |