Definition of "peripheral"

We have isolated the gene encoding the Schwann cell glycoprotein P0, the major structural protein of the peripheral myelin sheath.

1988 March 1, “Isolation and analysis of the gene encoding peripheral myelin protein zero”, in Neuron‎, page 73

Check your peripheral's manual for the information you'll need.

1984, Human Connection, Making MS-DOS & PC-DOS work for you

Check your peripheral's owners' manual to see at what speed your peripheral transmits or receives information, and then record this on the DIP Switch Information chart in the column at the left.

1986, Ziff-Davis Publishing Company, (Please provide the book title or journal name)

Turn on the Mac, and check your peripheral. Since you've already installed your device driver, it should be available where you need it....

1994, Steve Birchall, Upgrading and repairing Macs

We hailed a cab. The moment we got in, she stared at me with how-can-a-man-be-so-cruel eyes. I felt her glare, saw some of its fiery glow in my peripheral. The heat made me glance her way.

2000, Eric Jerome Dicke, Milk in My Coffee

He would hear the coach's admonition, "Always check your peripheral," after the ringing stopped in his ears. But before then, his eyes were fixed on the ball and a possible interception, not the receiver angling toward him.

2003, Kim Louise, The Glory of Love

As I sat by the window and read, I caught sight of the mailman in my peripheral.

2013, Saye Z. B. Zonen, Finding My Frequency

I was kind of looking at the ball, keeping him in my peripheral and all of sudden I see him closing in on the ball.

2014, Bill Ladson, "Zimmerman handles left field with ease -- and no E's" on MLB.com