The term 'DOM' is an abbreviation for DOM Perignon, a French Benedictine monk who was an important figure in the development of champagne. He is credited with inventing the technique of blending different wines to create a more consistent flavor. He also developed the use of cork stoppers and the practice of aging champagne in cellars. His name has become synonymous with champagne, and his legacy lives on in the many brands of champagne that bear his name.