peripheral

名词 peripheral:

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

形容词 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.
   计算机系统或外设在地板或台上所需要占用的空间面积。具有较小占地面积的系统和外设，其优点是可留出更多的空间留做其它用途。
2. The central processing unit of a computer exclusive of peripheral and remote devices.
   主机计算机除了外部和分离的装置以外的中心运作部件
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.
   一种接口部件或电路，用来把数据转换成某种特殊的外围设备上的表示或某类外围设备上的表示或把此种表示转换成数据。例如，一台在串行位和并行位之间作转换且解决传输速度差别的设备。

pe.riph.er.al

adj.（形容词）
Related to, located in, or constituting an outer boundary or periphery.
周缘的：关于、位于或组成外部边界或周缘的
Perceived or perceiving near the outer edges of the retina:
外围的：观察快超出视网膜边缘的：
例句：
peripheral vision.
外围视野

Anatomy
【解剖学】
Of the surface or outer part of a body or organ; external.
外表面的：身体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.
边缘神经系统的：属于、关于或部分于边缘神经系统的
Of minor relevance or importance.
联系很小或重要性小的
Auxiliary.
辅助的
n.Computer Science （名词）【计算机科学】
An auxiliary device, such as a printer, modem, or storage system, that works in conjunction with a computer.
外部设备：辅助设备，如与计算机连接工作的打印机、调制解调器或存储系统

【引伸】
periph.erally
adv.（副词）