Bicarbonate/ˌbaɪˈkɑːrbənət/ Definition 1 of 2Pro Tip 1/3Cooking Agent Bicarbonate releases gas, making baked goods fluffy, an essential in kitchens. Add two teaspoons of bicarbonate to the cake mixture for a better rise. Pro Tip 2/3Medicinal Use Bicarbonate is an antacid, neutralizing stomach acid and relieving indigestion. He used a bicarbonate solution to ease his heartburn. Pro Tip 3/3Household Cleaning As a mild abrasive, bicarbonate cleans surfaces without scratching them. Sprinkle bicarbonate on the carpet to remove odors.