Definition of otheoscope in US English:

otheoscope

noun

rare, historical
  • A modification of Crookes's radiometer in which the black or driving surface is stationary, whilst the cooling surface is movable.

Origin

Late 19th century; earliest use found in William Crookes (1832–1919), chemist and science journalist. From ancient Greek ὠθεῖν to push + -o- + -scope; compare quot. 1877.

Pronunciation

otheoscope

/ˈəʊθɪəskəʊp/