Source : WordNet®

ergonomics
     n : the branch of engineering science in which biological
         science is used to study the relation between workers and
         their environments [syn: {biotechnology}, {bioengineering}]

Source : Free On-Line Dictionary of Computing

ergonomics
     
        The study of the design and arrangement of equipment so that
        people will interact with the equipment in healthy,
        comfortable, and efficient manner.  As related to computer
        equipment, ergonomics is concerned with such factors as the
        physical design of the keyboard, screens, and related
        hardware, and the manner in which people interact with these
        hardware devices.
     
        (1995-04-14)