noun
diluted solution
Technical term used in chemistry, medicine, and laboratory contexts for a solution that has been made less concentrated by adding solvent.
この実験では、原液を水で薄めた希釈液を使用します。
In this experiment, we use a diluted solution made by thinning the stock solution with water.
消毒用アルコールの希釈液をスプレーボトルに入れてください。
Please put the diluted solution of rubbing alcohol into a spray bottle.
濃縮液 is a concentrated solution, the opposite of 希釈液.
Compound of 希釈 (dilution) and 液 (liquid, solution). 希釈 is a Sino-Japanese word meaning 'dilute', and 液 is a common suffix for liquids.