Marmalade orange is a citrus fruit that is mostly used for making marmalade. However, there are other synonyms for marmalade orange such as Seville orange, bitter orange, and sour orange. These oranges are not commonly eaten raw because of their tartness and bitterness. They are mostly used in cooking and baking to add flavor to dishes. Marmalade oranges are rich in vitamin C, dietary fiber, and antioxidants that are good for the body. They are mostly cultivated in Spain, Italy, and Florida. They can be used to make marinades, dressings, and sauces. In summary, marmalade oranges are a unique fruit with a distinct flavor and have many health benefits when consumed.