Quince is an oblong, pear-shaped fruit. Quince is not a particularly popular fruit, but makes a good jam and is a classic from Portugal - Quince Cheese or Dulce de Membrillo. Dulce de Mebrillo is delicious with cheese.
Dowell, P., Bailey, A. (1980) The Book of Ingredients, Dorling Kindersley. ISBN 0718119150.