Kumquat is a small, oval, orange-like fruit with a sweet skin and juicy, and a slightly bitter flesh. Kumquats can be served fresh and eaten with the skin, but is also found boiled in syrup in their skins. Kumquats are also used in preserves.
Dowell, P., Bailey, A. (1980) The Book of Ingredients, Dorling Kindersley. ISBN 0718119150.