a part of a structure having some specific characteristic or function | a small hole or loop (as in a needle) |
the extent of a 2-dimensional surface enclosed within a boundary | the organ of sight |
a part of an animal that has a special function or is supplied by a given artery or nerve | good discernment (either visually or as if visually) |
a subject of study | attention to what is seen |
a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography) | an area that is approximately central within some larger region |
a particular environment or walk of life | |