|1.||not relating to the most important part of something; incidental, minor, or superficial|
|2.||of, relating to, or of the nature of a periphery|
|3.||anatomy of, relating to, or situated near the surface of the body: a peripheral nerve|
peripheral pe·riph·er·al (pə-rĭf'ər-əl)
|peripheral (pə-rĭf'ər-əl) Pronunciation Key
Noun Computer Science An auxiliary device, such as a printer or modem, distinct from a computer's central processing unit and working memory, and often connected externally.
Any part that is separate from a computer's CPU, such as a printer, a keyboard, or a monitor.