(n) :
Alternative form of dictograph. [(historical) A telephonic instrument for office or similar use, having a sound-magnifying device enabling the ordinary mouthpiece to be dispensed with. It was sometimes used for covertly recording conversations.]
(n) :
Alternative form of dictograph. [(historical) A telephonic instrument for office or similar use, having a sound-magnifying device enabling the ordinary mouthpiece to be dispensed with. It was sometimes used for covertly recording conversations.]