Expander may refer to: * Dynamic range compression operated in reverse *Part of the process of signal compression *Part of the process of companding *A component used to connect SCSI computer data storage, devices together * Turboexpander, a turbine for high-pressure gas * Expander graph, a sparse graph used in the combinatorics branch of mathematics * StuffIt Expander, a computer file decompressor software utility * "Expander" (song), a 1994 song by The Future Sound of London *

Orthodontic expander A palatal expander is a device in the field of orthodontics which is used to widen the upper jaw (maxilla) so that the bottom and upper teeth will fit together better. This is a common orthodontic procedure. Although the use of an expander is mos ...

, a device to widen the upper jaw * Disclosure widget, a widget that hides non-essential settings or information, also known as an expander

See also