S: (n) computer accessory (an accessory for a computer) "when you add in all the computer accessories you are going to need the computer gets pretty expensive"
S: (n) fitting (a small and often standardized accessory to a larger system)
S: (n) gas fitting (the fitting (pipes or valves or meters) that convey gas from the gas main to the gas fixtures of a building)
S: (n) reducer (pipefitting that joins two pipes of different diameter)
S: (n) receptacle (an electrical (or electronic) fitting that is connected to a source of power and equipped to receive an insert)
S: (n) outlet box ((electricity) receptacle consisting of the metal box designed for connections to a wiring system)
S: (n) slot, expansion slot ((computer) a socket in a microcomputer that will accept a plug-in circuit board) "the PC had three slots for additional memory"
S: (n) socket (a receptacle into which an electric device can be inserted)
S: (n) fixings, trimmings (the accessories that normally accompany (something or some activity)) "an elaborate formal dinner with all the fixings"; "he bought a Christmas tree and trimmings to decorate it"