pneumatoscope

pneu·mat·o·scope

(nū-mat'ō-skōp),
1. Obsolete term for an instrument for measuring the extent of the respiratory excursions of the chest.
2. Obsolete term for an instrument for use in auscultatory percussion, the percussion sounds of the chest being heard at the mouth.
Synonym(s): pneumoscope
[G. pneuma, air, + skopeō, to examine]