News media often use the name of a capital city as an alternative name for the country of which it is the capital or of the government that is seated there, as a form of metonymy. For example, "relations between Washington and London" refer to "relations between the United States and the United Kingdom".
The word capital derives from the Latincaput (genitive capitis), meaning ‘head’.
In several English-speaking states, the terms county town and county seat are also used in lower subdivisions. In some unitary states, subnational capitals may be known as ’administrative centres’. The capital is often the largest city of its constituent, though not always.