Decilitre/ˈdesɪliːtər/ Definition 1 of 1Pro Tip 1/3Measurement Unit Used for precise quantities, especially in recipes or lab instructions. Add one decilitre of rice to the boiling water. Pro Tip 2/3Cooking Context Often found in recipes from countries using the metric system. Pour three decilitres of vegetable broth into the pot. Pro Tip 3/3Metric Conversion Understanding conversions is crucial; one decilitre is 100 millilitres. Please measure 5 decilitres of milk; that's 500 millilitres.