diluted solution
Technical term used in chemistry, medicine, and laboratory contexts for a solution that has been made less concentrated by adding solvent.
In this experiment, we use a diluted solution made by thinning the stock solution with water.
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.