a scientific instrument used to measure the freezing point of liquids, especially to determine the concentration of dissolved substances in a solution.
From Greek 'kryos' (cold) + 'skopein' (to observe), literally 'cold-observer,' named for its function of precisely measuring freezing temperatures.
Chemists use cryoscopes to figure out how many dissolved particles are in a solution—when you add salt to water, it lowers the freezing point, and scientists can measure this drop to calculate the salt concentration.
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