me·dal·lion 
(mĭ-dălyən)
(mĭ-dălyən)n.
1. A large medal.
2. An emblem of registration for a taxicab.
3. Any of various large ancient Greek coins.
4. Something resembling a large medal, as:
a. An oval or circular design used as decoration.
b. A painting or an engraving set in an oval or circular frame.
c. A circular portion of food, especially a boneless cut of meat: medallions of veal.
[French médaillon, from Italian medaglione, augmentative of medaglia, medal, from Old Italian; see MEDAL.]