noun
- the transmission of images or photographs over a distance using electrical or electronic signals
Usage: technical; historical
Examples
- Phototelegraphy was an early precursor to modern fax technology.
- The invention of phototelegraphy allowed newspapers to transmit photographs across continents.
- Early phototelegraphy systems used selenium cells to convert images into electrical signals.
- Phototelegraphy represented a major advancement in long-distance communication during the 20th century.