|distillation (dĭs'tə-lā'shən) Pronunciation Key
A method of separating a substance that is in solution from its solvent or of separating a liquid from a mixture of liquids having different boiling points. The liquid to be separated is evaporated (as by boiling), and its vapor is then collected after it condenses. Distillation is used to separate fresh water from a salt solution and gasoline from petroleum. ◇ The condensed vapor, which is the purified liquid, is called the distillate.