Enamel (noun)

1. A hard, glossy coating that is fused to the surface of metal, glass, or ceramics by firing, typically applied to decorate or protect the surface.
2. A paint or coating that dries to a hard, glossy finish.
3. A hard, glossy coating on teeth that is similar to enamel on metal.

Origin:

Middle english: from old french enamel, from enameler "enamell with", based on late latin inamelare, from in- "on" + amellus "littoral", from amel "sea-shore".

Examples:

1. An enamel coating on a metal watch.
2. The enamel on the teeth is the hardest substance in the body.
3. A enamel paint for cars.
4. The enamel on the pot was chipped.
5. Enamel is a type of glassy coating that is fused to metal or ceramic.