- phonacoscope
- An instrument for increasing the intensity of the percussion note or of the voice sounds, the examiner's ear or the stethoscope being placed on the opposite side of the chest. [phon- + G. akouo, to listen, + skopeo, to view]
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pho·naco·scope (fo-nakґo-skōp) the apparatus used in phonacoscopy.
Medical dictionary. 2011.