Definition of thermophone
1 : a portable telethermometer using a telephone in connection with a differential thermometer
2 : a telephone involving heat effects (as changes in temperature) due to pulsations of the line current in a fine wire connected with the receiver diaphragm
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of thermophone
International Scientific Vocabulary therm- + telephone
Seen and Heard
What made you want to look up thermophone? Please tell us where you read or heard it (including the quote, if possible).