The Golgi apparatus (also called the Golgi bodys, Golgi complex, dictyosome, or more colloquially Golgi) is an organelle found in most eukaryotic cells. It was identified in 1898 by the Italian physician Camillo Golgi and was named after him. The primary function of the Golgi apparatus is to process and package macromolecules, such as proteins and lipids, after their synthesis and before they make their way to their destination; it is particularly important in the processing of proteins for secretion.

The Golgi apparatus forms a part of the cellular endomembrane system. The Golgi is composed of membrane-bound stacks known as cisternae (singular: cisterna). Between four and eight are usually present; however, in some protists as many as sixty have been observed.

Each cisterna comprises a flattened membrane disk, and carries Golgi enzymes to help or to modify cargo proteins that travel through them.

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