Rekesz

Rekesz is a Hungarian noun with several related meanings centered on the idea of a hollow space or enclosed compartment. In broad usage it denotes a cavity or chamber within a physical object, such as a body cavity or a component housing other parts. In anatomical terms, rekesz appears in references to cavities and partitions, and it is also the root in words like rekeszizom, the diaphragm, which forms a partition between the thoracic and abdominal cavities and is essential to respiration. In technical contexts, rekesz can describe a chamber or compartment inside a device where fluids, air, or other substances are contained or separated.

In photography and optics, rekesz refers specifically to the camera aperture—the opening through which light passes into the lens. The size of the rekesz determines the amount of light reaching the sensor or film and influences depth of field. A larger opening (lower f-number) allows more light and produces a shallower depth of field, while a smaller opening (higher f-number) reduces light and increases depth of field.

In engineering and mechanical contexts, rekesz is used to name a chamber or compartment within various devices, such as pumps or valves, that houses components or separates different media. The exact meaning depends on the device and the technical vocabulary of the field.

See also: diaphragm, aperture, cavity.