Thermophone

1 definition found

From The Collaborative International Dictionary of English v.0.48 [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.]