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4 definitions found
 for peripheral
From The Collaborative International Dictionary of English v.0.48 :

  Peripheral \Pe*riph"er*al\, a.
     1. Of or pertaining to a periphery; constituting a periphery;
        [1913 Webster]
     2. (Anat.) External; away from the center; on or near the
        surface; as, the peripheral portion of the nervous system.
        [1913 Webster]
     3. Pertaining to minor, unimportant, superficial, or
        irrelevant aspects of the matter in question; as,
        peripheral isssues are dealt with in the appendix.
        [PJC] Peripheric

From WordNet (r) 3.0 (2006) :

      adj 1: on or near an edge or constituting an outer boundary; the
             outer area; "Russia's peripheral provinces"; "peripheral
             suburbs" [ant: central]
      2: 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"
      n 1: (computer science) electronic equipment connected by cable
           to the CPU of a computer; "disk drives and printers are
           important peripherals" [syn: peripheral, computer
           peripheral, peripheral device]

From Moby Thesaurus II by Grady Ward, 1.0 :

  56 Moby Thesaurus words for "peripheral":
     ambient, apparent, beside the point, circling, circumambient,
     circumferential, circumflex, circumfluent, circumfluous,
     circumjacent, cortical, delineatory, embracing, encircling,
     enclosing, encompassing, enfolding, enveloping, environing,
     epidermic, exomorphic, exterior, external, extrinsic, fringe,
     in outline, incidental, inessential, irrelevant, minor,
     neighboring, open, out, outer, outermost, outlined, outlying,
     outmost, outside, outstanding, outward, outward-facing, perimetric,
     public, roundabout, secondary, seeming, suburban, superficial,
     surface, surrounding, tangential, unessential, unimportant,
     unnecessary, wrapping

From The Free On-line Dictionary of Computing (30 December 2018) :

  peripheral device
      (Or "peripheral device", "device") Any part of a
     computer other than the CPU or working memory,
     i.e. disks, keyboards, monitors, mice, printers,
     scanners, tape drives, microphones, speakers,
     cameras, to list just the less exotic ones.
     High speed working memory, such as RAM, ROM or, in the
     old days, core would not normally be referred to as
     peripherals.  The more modern term "device" is also more
     general in that it is used for things such as a pseudo-tty,
     a RAM drive, or a network adaptor.
     Some argue that, since the advent of the personal computer,
     the motherboard, hard disk, keyboard, mouse, and monitor
     are all parts of the base system, and only use the term
     "peripheral" for optional additional components.

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