[1] : The Collaborative International Dictionary of English v.0.48

potentiometer \poten`tiom"eter\, n. potential + -meter.
   elec.
   an instrument for measuring or comparing electrial potentials
   or electro-motive forces.
   1913 webster

[2] : WordNet (r) 2.0

potentiometer
     n 1: a measuring instrument for measuring direct current
          electromotive forces
     2: a resistor with three terminals, the third being an
        adjustable center terminal; used to adjust voltages in
        radios and tv sets syn: pot
see also:
pot 

Potentiometer >> P Words
Potentiometer, definition of term: Potentiometer
potentiometer_pag1.html