A mechanical device used for extracting a component from others, such as a machine for clearing honeycombs or a device for rendering wax.

(chemistry) An apparatus that uses a solvent to remove soluble substances from a mixture.

A centrifugal drying machine.

(in a gun) A part of the bolt that removes a cartridge from the chamber.

(graph theory) A particular kind of bipartite graph.

A function which, being applied to output from a weakly random entropy source, together with a short, uniformly random seed, generates a highly random output that appears independent from the source and uniformly distributed.