Cum annexis (often abbreviated to c.a.) is a Latin expression and means: belonging to it, with accessories or the like (also: cum omnibus annexis, with all accessories).

The term is widely used in legal language, for example, to indicate the attachments that belong to a main document. Older acts also mention abstinence and dependence.

The word became and is also used to indicate a city name, where the main site of this municipality is followed by the abbreviation c.a., which represents the corresponding nuclei. These are municipalities that were merged in the early 19th century.

Known examples are:

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