noun
medallion
muh-DAL-yun/məˈdæliən/
A small round emblem resembling a medal.
The ornate bronze medallion forms a round pendant.

Etymology
The enlarging suffix turns “medal” into “large medal.” The name then extended to things shaped like a medal, accounting for its use for round decorative ornaments.
In context
I'm wondering if that isn't the round medallion from necklace that makes that entry wound.
More examples
- The wooden box has a carved medallion on its lid.
- Two bronze medallions decorate the garden gate.
- She stitches a round medallion onto the jacket.
Forms
medallion · medallions