1. smell-o-vision - Noun
2. Smell-o-vision - Proper noun
smell-o-vision (uncountable)
Cinematography with the addition of olfaction, often portrayed as futuristic or far-fetched.
English Wikipedia has an article on:Smell-O-VisionWikipedia
Smell-O-Vision
A system that choreographed the release of odors during the projection of a film, invented by Hans Laube.
Smell-O-Vision (uncountable)
(nonstandard) Any such system that adds olfaction to cinematography, often portrayed as futuristic or far-fetched.