Source : WordNet®

assembly language
     n : a low-level programing language; close approximation to
         machine language

Source : Free On-Line Dictionary of Computing

Assembly Language
     
         (AL) A language for industrial {robots}
        developed at {Stanford University} in the 1970s.
     
        ["The AL Language for an Intelligent Robot", T. Binford in
        Langages et Methods de Programation des Robots Industriels,
        pp. 73-88, IRIA Press 1979].
     
        ["AL User's Manual", M.S. Mujtaba et al, Stanford AI Lab, Memo
        AIM-323 (Jan 1979)].
     
        (1994-11-24)

assembly language
     
         (Or "assembly code") A symbolic representation of
        the {machine language} of a specific {processor}.  Assembly
        language is converted to {machine code} by an {assembler}.
        Usually, each line of assembly code produces one machine
        instruction, though the use of {macros} is common.
     
        Programming in assembly language is slow and error-prone but
        is the only way to squeeze every last bit of performance out
        of the hardware.
     
        {Filename extension}: .s ({Unix}), .asm ({CP/M} and others).
     
        See also {second generation language}.
     
        (1996-09-17)