appliance

n. tool, gadget; device, apparatus

Appliance may refer to a device with a narrow function:Home appliance, routine household tasks, using electricity or some other energy input.Small appliancesMajor appliancesIn medicine and dentistry, custom-fitted appliances to an individual for the purpose of correction of a physical or dental problem such as prosthetic, orthotic appliances, and dental braces. Computer appliance, a computing device with a specific function and limited configuration abilityFire apparatus, a fire engine or fire truck in British English
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Noun
1. a device that is very useful for a particular job
(synonym) contraption, contrivance, convenience, gadget, gizmo, gismo, widget
(hypernym) device
(hyponym) gadgetry
2. durable goods for home or office use
(hypernym) durables, durable goods, consumer durables
(hyponym) dryer, drier

(n.)
The thing applied or used as a means to an end; an apparatus or device; as, to use various appliances; a mechanical appliance; a machine with its appliances.
  

(n.)
The act of applying; application; [Obs.] subservience.
  

noun
piece of apparatus used on the body; he wore a surgical appliance to support his neck