• Webster's Revised Unabridged Dictionary
    • n Phonomotor (Physics) An instrument in which motion is produced by the vibrations of a sounding body.
    • ***
Century Dictionary and Cyclopedia
    • n phonomotor An instrument by which the energy of sound-waves, as those produced by the human voice, may be made to perform mechanical work. Such an instrument invented by Edison has a mouthpiece like that of a phonograph, and a diaphragm the vibration of which, transmitted by means of a pawl, causes a small wheel to revolve. Compare phonoscope.
    • ***


Webster's Revised Unabridged Dictionary
Phono-, + -motor,


In literature:

The second includes devices like the tasimeter, phonomotor, odoroscope, etc., and others now to be noted.
"Edison, His Life and Inventions" by Frank Lewis Dyer and Thomas Commerford Martin