noun

1. a large medal
2. an oval or circular design, portrait, relief carving, etc. resembling a medal in shape and used as a decorative form in architecture, textiles, etc.
3. a metal insignia on a taxicab indicating that the driver or owner has a permit to carry passengers
4. a small round or oval portion of meat or fish, especially of beef or veal

Etymology: Fr médaillon < It medaglione < medaglia: see medal