Source : WordNet®

carriage return
     n : the operation that prepares for the next character to be
         printed or displayed as the first character on a line

Source : Free On-Line Dictionary of Computing

Carriage Return
     
         (CR, Control-M, {ASCII} 13) The character which
        causes the {cursor} to move to the left margin, often used
        with {line feed} to start a new line of output.
     
        Encoded in {C} and {Unix} as "\r".
     
        (1996-06-24)