Source : Free On-Line Dictionary of Computing

instruction mnemonic
     
         A word or acronym used in {assembly language} to
        represent a {binary} machine instruction {operation code}.
        Different processors have different {instruction set} and
        therefore use a different set of {mnemonics} to represent
        them.
     
        E.g. ADD, B (branch), BLT (branch if less than), {SVC}, MOVE,
        LDR (load register).
     
        (1997-02-18)