Citrus aurantifolia is commonly known as the lime fruit and is a type of citrus fruit. It is a small, green fruit that is very sour and acidic. There are many synonyms for the lime fruit, including the Mexican lime, the West Indian lime, and the Key lime. In Spanish, it is known as limón, while in India, it is called nimbu. In Brazil, the lime fruit is known as limão, and in some parts of Africa, it is referred to as ndimu. Regardless of what it is called, the lime fruit is an incredibly popular ingredient for cooking, baking, and cocktail-making due to its tangy and refreshing flavor.