Spirometer
Pronunciation : Spi*rom"e*ter
Part of Speech : n.
Etymology : [L. spirare to breathe + -meter.]
Definition : Defn: An instrument for measuring the vital capacity of the lungs, or the volume of air which can be expelled from the chest after the deepest possible inspiration. Cf. Pneumatometer.
Source : Webster's Unabridged Dictionary, 1913