1More fully "bigarade orange". The Seville orange, a variety of the sour orange, Citrus aurantium.
The fruit, leaves, and flowers of the bigarade are also sources of essential oils.
2Attributive and as postpositive. Designating a sauce made with bigarade oranges, and dishes, especially roast duck, served with this sauce.
Mid 17th century; earliest use found in John Evelyn (1620–1706), diarist and writer. From French bigarade, †bigarrade, probably from Occitan bigarrada from bigarrar to variegate (related to French bigarrer) + -ada.