Definitions

1. noun

An instrument used to measure the osmotic pressure of a solution, typically by measuring the pressure required to prevent the movement of solvent molecules across a semipermeable membrane.

“The researcher used an osmometer to analyze the osmotic pressure of the new serum.”

2. noun

A device for measuring the concentration of a solution, often based on the osmotic pressure exerted by the solution on a semipermeable membrane.

“The chemist used an osmometer to determine the concentration of the sugar solution.”