A system of television, invented by John Logie Baird but never publicly demonstrated, whereby vision and sound signals could be recorded on discs similar to gramophone records.
Origin
1920s; earliest use found in Punch.
Definition of phonovision in US English:
phonovision
noun
historical
A system of television, invented by John Logie Baird but never publicly demonstrated, whereby vision and sound signals could be recorded on discs similar to gramophone records.