Compound fruit

The term compound fruit is not used in technical botanical writing, but is sometimes used when it is not clear which of several fruit types is involved. A compound fruit is "composed of two or more similar parts".^[1]

A compound fruit may be:

An aggregate fruit, in which one flower contains several separate ovaries, which merge during development.
A multiple fruit, in which several flowers, each with an ovary, develop into small fruits that are clustered or fused together into a larger fruit.
A simple fruit formed from a compound ovary.

A raspberry is an aggregate fruit (shown with a raspberry beetle larva)
A pineapple is a multiple fruit
A tomato is a simple fruit derived from a compound ovary

Grapes grow in clusters, but are not compound fruits. Each grape is grown from one ovary in one flower, and each grape remains an independent fruit.

References

^ Hickey, M.; King, C. (2001). The Cambridge Illustrated Glossary of Botanical Terms. Cambridge University Press.

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[1] Hickey, M.; King, C. (2001). The Cambridge Illustrated Glossary of Botanical Terms. Cambridge University Press.

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v t e Types of fruits
Types of fruits	Achene Berry Hesperidium Pepo Capsule Caryopsis Drupe Follicle Legume Loment Nut Pome Samara Schizocarp Silique Syconium
Categories of fruits	Accessory fruit Simple fruit Compound fruit Aggregate fruit Multiple fruit Dehiscent fruit
Function	Diaspore Drift fruit