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Medical Definition of Tissot spirometer
1. A very large water-sealed spirometer designed for accumulating expired gas over a long period of time; the counterbalancing of the bell (almost frictionless) is compensated for the bell's change in buoyancy as it emerges from the water, keeping the contained gas precisely at ambient atmospheric pressure. (05 Mar 2000)
Lexicographical Neighbors of Tissot Spirometer
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