spirometer Meaning, Definition & Usage

  1. noun a measuring instrument for measuring the vital capacity of the lungs

WordNet

Spi*rom"e*ter noun
Etymology
L. spirare to breathe + -meter.
Definitions
  1. 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.

Webster 1913