In botany, a berry is a fleshy fruit without a
stone produced from a single flower containing one ovary.
Berries so defined include grapes, currants, and tomatoes, as
well as cucumbers, eggplants, and bananas, but exclude certain
fruits commonly called berries, such as strawberries and
raspberries.
By this definition,
oranges, kumquats, blueberries, and even tomatoes can be
considered part of the berry family. The term berry refers
generically to any small, edible fruit with multiple seeds.
Aggregate fruits, such as the blackberry, the raspberry, and the
boysenberry, which develop from several ovaries are berries in
this sense, but not in the botanical sense.