Rheoscope

A rheoscope is an instrument for detecting or measuring currents, such as fluid currents or electric currents. The word rheoscope as a detector of electrical currents was coined by Sir Charles Wheatstone about 1840 but is no longer used to describe electrical instruments. ...
Found on http://en.wikipedia.org/wiki/Rheoscope

Rheoscope

• (n.) An instrument for detecting the presence or movement of currents, as of electricity.
Found on http://thinkexist.com/dictionary/meaning/rheoscope/

Rheoscope

Rhe'o┬Ěscope noun [ Greek 'rei^n to flow + -scope .] (Physics) An instrument for detecting the presence or movement of currents, as of electricity.
Found on http://www.encyclo.co.uk/webster/R/75
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