Source : Webster's Revised Unabridged Dictionary (1913)

Rheometer \Rhe*om"e*ter\, n. [Gr. "rei^n to flow + -meter.]
   [Written also {reometer}.]
   1. (Physics) An instrument for measuring currents, especially
      the force or intensity of electrical currents; a
      galvanometer.

   2. (Physiol.) An instrument for measuring the velocity of the
      blood current in the arteries.