Blood alcohol Concentration. The percentage of alcohol present in a person's blood.â€¢ Drink Driving
Blood or breath alcohol concentration. The usual ratio standards are the number of grams of alcohol either per 100 milliliters of blood, or per 210 liters of breath.
Refers to either blood alcohol concentration, stated as grams per 100 milliliters (or deciliter) of blood, or breath alcohol concentration, stated as grams per 210 liters of breath.