Fruit

In cuisine, when food items are called "fruit", the term is most often used for those plant fruits that are edible and sweet and fleshy, examples of which include plums, apples and oranges. But in cooking, the word fruit may also rarely be loosely applied to other parts of a plant, such as the stems of rhubarb, which are made into sweet pies, but which are not botanically a fruit at all. -- excerpted from Fruit on Wikipedia