'Thermophone' definitions:
Definition of 'Thermophone'
From: GCIDE
- Thermophone \Ther"mo*phone\, n. [Thermo- + phone.]
- 1. A portable form of telethermometer, using a telephone in connection with a differential thermometer. [Webster 1913 Suppl.]
- 2. A telephone involving heat effects, as changes in temperature (hence in length) due to pulsations of the line current in a fine wire connected with the receiver diaphragm. [Webster 1913 Suppl.]