heir·loom /ˈærˌlum, ˈɛr-/
Heir·loom n. Any furniture, movable, or personal chattel, which by law or special custom descends to the heir along with the inheritance; any piece of personal property that has been in a family for several generations.
Woe to him whose daring hand profanes
The honored heirlooms of his ancestors. --Moir.
n 1: (law) any property that is considered by law or custom as
inseparable from an inheritance is inherited with that
2: something that has been in a family for generations