Mayonnaise

Mayonnaise (or in AmE also, and often abbreviated as mayo) is a thick, creamy dressing often used as a condiment. It is a stable emulsion of oil, egg yolk, and either vinegar or lemon juice, with many options for embellishment with other herbs and spices. Proteins and lecithin in the egg yolk serve as emulsifiers in both mayonnaise and hollandaise sauce. Commercial are available for vegans and others who want to avoid animal products and cholesterol, or who are allergic to eggs.
Ver en Wikipedia.org