me ‧ dal ‧ li ‧ on /məˈdæliən, mɪˈdæliən/ BrE AmE noun [countable]
[ Date: 1600-1700 ; Language: French ; Origin: médaillon , from Italian medaglione , from medaglia ; ⇨ ↑ medal ]
a piece of metal shaped like a large coin, worn as jewellery on a chain around the neck:
a silver medallion