Definition of rheoscope in US English:

rheoscope

noun

  • 1Electricity. An instrument for detecting the existence of an electric current; a means of detecting a current. Now historical and rare.

  • 2Physics. An instrument for observing the effects of shear on particles, especially red blood cells.

Origin

Mid 19th century; earliest use found in Charles Wheatstone (1802–1875), developer of telegraphy. From rheo- + -scope.

Pronunciation

rheoscope

/ˈriːəskəʊp/