Definition of reflectoscope in US English:

reflectoscope

noun

  • 1A device which projects an image of an object on to a screen by reflecting light from it. Now rare.

  • 2Chiefly Metallurgy. An instrument for investigating the internal structure of opaque objects by transmitting ultrasound into them and analysing its reflection.

Origin

Early 20th century; earliest use found in The Boston Globe. From reflect + -o- + -scope.

Pronunciation

reflectoscope

/rɪˈflɛktəskəʊp/