Wiktionary
arrow key
n. Any of the four buttons of keyboards which each are marked with identical symbols that point in four different directions.
Usage examples of "arrow key".
When you enter a command that extends beyond a single line, you can continue to press the left arrow key at any time to scroll back toward the system prompt and verify the beginning of the command entry.
There was nothing on the screen mentioning the Nimitz or California, so she used an arrow key on a small keyboard to scroll through several pages of SBR contract data rreports.