Tambour

In architecture, "tambour" has three meanings. In classical architecture, a tambour (French for 'drum') is the inverted bell of the Corinthian capital around which are carved acanthus leaves for decoration. The term also applies to the wall of a circular structure, whether on the ground or raised aloft on pendentives and carrying a dome (also known as a tholobate). Finally, "tambour" can refer to the drum-shaped segments of a column, which is built up in several courses.