Meaning of microtelephone | Babel Free

Definitions

1. An early form of telephone capable of transmitting very faint sounds, in which the current generated by the vibration of the diaphragm is caused to pass through the diaphragm and core as well as the coil before it enters the line.
   historical
2. An early telephone having the transmitter and receiver mounted on the same handle for one-handed use.
   historical

CEFR level