carriage return

Short definition from Wiktionary

Noun

1. 1
   On a typewriter or computer printer, the action that returns it to the beginning of the next line.
2. 2
   The control character (0x0D in ASCII, abbreviated as CR) that originally signaled a device to perform a carriage return, but now merely indicates the end of a line of text (newline).
3. 3
   The key or lever that initiates the carriage return action (on a typewriter) or generates the carriage return character (on a computer).