PERIPHERAL

I. adjective Date: 1808 of, relating to, involving, or forming a periphery or surface part, 2. of, relating to, affecting, or being part of the ~ nervous system , of, relating to, or being blood in the systemic circulation , of, relating to, or being the outer part of the field of vision , auxiliary , supplementary , ~ly adverb II. noun Date: 1966 a device connected to a computer to provide communication (as input and output) or auxiliary functions (as additional storage)