périphérique[Français]

adjectif satellite
1 : related to the key issue but not of central importance; "a peripheral interest"; "energy is far from a peripheral issue in the economy"; "peripheral issues"
adjectif
1 : on or near an edge or constituting an outer boundary; the outer area
nom
1 : (computer science) electronic equipment connected by cable to the CPU of a computer
2 : the outside boundary or surface of something