Seville Orange, also known as bitter orange, is a citrus fruit that is highly acidic and has a sour taste. It is widely used in cooking and baking, especially in marmalades and liqueurs. There are several synonyms for the Seville Orange, including sour orange, bigarade orange, marmalade orange, and Seville sour orange. The fruit is characterized by its knobby, rough skin and a bright, orange color. While the fruit may be too sour for eating raw, it is a popular ingredient in both sweet and savory dishes. Its distinctive flavor and aroma make it a favorite among chefs and food enthusiasts, and it is widely grown and used in Mediterranean cuisine.