Definition of electro-chronograph in English:

electro-chronograph

noun

historical
  • An instrument for recording the exact time of (usually astronomical) events by means of interruption of an electrical circuit.

Origin

Mid 19th century.

Pronunciation

electro-chronograph

/ɪˌlɛktrəʊˈkrɒnəɡrɑːf//ɪˌlɛktrəʊˈkrɒnəɡraf/