appurtenance \uh-PUR-tn-un(t)s\, noun:

1. An adjunct; an accessory; something added to another, more important thing.
2. [Plural]. Accessory objects; gear; apparatus.
3. [Law]. An incidental right attached to a principal property right for purposes such as passage of title, conveyance, or inheritance.

The inauguration of presidents, the coronation of monarchs, the celebration of national holidays--these events require everywhere the presence of the soldier as a "ceremonial appurtenance."
-- Barbara Ehrenreich, Blood Rites