Source : WordNet®

machine language
     n 1: a programming language designed for use on a specific class
          of computers [syn: {computer language}, {computer-oriented
          language}, {machine-oriented language}]
     2: a set of instructions coded so that the computer can use it
        directly without further translation [syn: {machine code}]

Source : Free On-Line Dictionary of Computing

machine language
     
        {machine code}