hydrometer
/haɪˈdrɑmɪtər/
noun
- An instrument used to measure the density or specific gravity of a liquid, often used to check the concentration of a solution.
- A hydrometer can tell you if your car's battery acid is at the right strength.
- The winemaker used a hydrometer to check the sugar level in the grape juice.
- In science class, we lowered a hydrometer into the saltwater to measure its density.
Synonyms