名詞 peripheral:

1. (computer science) electronic equipment connected by cable to the CPU of a computer
   同義詞：computer peripheral, peripheral device

形容詞 peripheral:

1. on or near an edge or constituting an outer boundary; the outer area
2. related to the key issue but not of central importance

1. The amount of space, desktop or floor, needed by a computer system or peripheral. Systems and peripherals with smaller footprints have the advantage of leaving more room available for other things.
   計算機系統(tǒng)或外設在地板或臺上所需要占用的空間面積。具有較小占地面積的系統(tǒng)和外設，其優(yōu)點是可留出更多的空間留做其它用途。
2. The central processing unit of a computer exclusive of peripheral and remote devices.
   主機計算機除了外部和分離的裝置以外的中心運作部件
3. An interface unit or circuitry that converts data to and from the representation used by a particular peripheral device or class of peripheral devices; for example, a device that converts between bit serial and bit parallel and resolves differences in transmission speeds.
   一種接口部件或電路，用來把數(shù)據(jù)轉(zhuǎn)換成某種特殊的外圍設備上的表示或某類外圍設備上的表示或把此種表示轉(zhuǎn)換成數(shù)據(jù)。例如，一臺在串行位和并行位之間作轉(zhuǎn)換且解決傳輸速度差別的設備。

pe.riph.er.al

adj.（形容詞）
Related to, located in, or constituting an outer boundary or periphery.
周緣的：關于、位于或組成外部邊界或周緣的
Perceived or perceiving near the outer edges of the retina:
外圍的：觀察快超出視網(wǎng)膜邊緣的：
例句：
peripheral vision.
外圍視野

Anatomy
【解剖學】
Of the surface or outer part of a body or organ; external.
外表面的：身體或器官的外表面或外部的；外部的
Of, relating to, or being part of the peripheral nervous system.
邊緣神經(jīng)系統(tǒng)的：屬于、關于或部分于邊緣神經(jīng)系統(tǒng)的
Of minor relevance or importance.
聯(lián)系很小或重要性小的
Auxiliary.
輔助的
n.Computer Science （名詞）【計算機科學】
An auxiliary device, such as a printer, modem, or storage system, that works in conjunction with a computer.
外部設備：輔助設備，如與計算機連接工作的打印機、調(diào)制解調(diào)器或存儲系統(tǒng)

【引伸】
periph.erally
adv.（副詞）