Source : Webster's Revised Unabridged Dictionary (1913)

Ergometer \Er*gom"e*ter\, n. [Gr. ? work + -meter.] (Physics)
   A device for measuring, or an instrument for indicating,
   energy expended or work done; a dynamometer. --
   {Er`go*met"ric}, a.

Source : WordNet®

ergometer
     n : measuring instrument designed to measure power [syn: {dynamometer}]