eudiometer
/ˌjuːdiˈɑːmɪtər/
noun
- A scientific instrument used to measure the volume or change in volume of gases during a chemical reaction.
- The chemistry student used a eudiometer to measure the oxygen produced by the reaction.
- Early scientists relied on the eudiometer to analyze the composition of air.
- In the lab, the eudiometer was carefully filled with water to trap the gas sample.