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Meaning of phonoscope

pho•no•scope

Pronunciation: (fō'nu-skōp"), [key]
— n.
  1. an instrument for making visible the motions or properties of a sounding body.
  2. a device for testing the quality of strings for musical instruments.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.