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spirometer

spi·rom·e·ter [ spī rómmətər ] (plural spi·rom·e·ters)


noun 
Definition:
 
device for measuring lung capacity: an instrument for measuring the capacity of the lungs

[Mid-19th century. <spiro-1]

spi·ro·met·ric [ sprə méttrik ] adjective
spi·rom·e·try [ spī rómmətree ] noun
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