Definition of sciopticon in US English:

sciopticon

noun

historical
  • A portable magic lantern designed for displaying photographs.

Origin

Late 19th century; earliest use found in Documents Assembly State of New York. From scio- + optic + -on, after ancient Greek neuter nouns ending in -ον, probably as alteration of scioptic.

Pronunciation

sciopticon

/sʌɪˈɒptɪkɒn/