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Diccionario

Escribe una palabra en ingles o espanol. Ingles en azul, espanol en rosa. Toca cualquier linea para oirla.

heliograph

Ingles

  1. 🔊 an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
  2. 🔊 signal by means of a mirror and the using the sun's rays