Jingle Germs
ˈjiNGɡəl/Jerms
noun
1. : a bell mounted on a spring and used to signal the engine room for all speed available
2. : a small, hollow, perforated, spherical bell enclosing a loose pellet that causes the bell to jingle when shaken —called also cascabel, crotal, pellet bell
3. : a signal bell used on a shop door to announce the entrance of customers