Any of various mechanical devices that extract a component from others.
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.
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.