This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A gem or shell carved in relief, especially one in which the raised design and the background consist of layers of contrasting colors.

n. The technique of carving in this way.

n. A medallion with a profile cut in raised relief.

n. A brief vivid portrayal or depiction: a literary cameo.

n. A brief appearance of a prominent actor, as in a single scene of a motion picture. Also called cameo role.

v. To make into or like a gem or shell carved in relief.

v. To portray in sharp, delicate relief, as in a literary composition.

verb-intransitive. To make a brief appearance, as in a film: She cameoed as Anne Boleyn in A Man for All Seasons.

n. A piece of jewelry, etc., carved in relief.

n. A single very brief appearance by a prominent celebrity in a movie or song.

v. To appear in a cameo role.

n. A carving in relief, esp. one on a small scale used as a jewel for personal adornment, or like.

n. An engraving in relief upon a gem, a hard stone of moderate size, or a similar material, or the object itself so engraved, as distinguished from an intaglio; specifically, such an engraving upon a stone or a shell having two or three layers differing in color, such as an onyx, agate, etc., and so treated as to utilize the effect of the variety of coloring.

n. Hence Raised or anaglyphic work in art on a miniature scale; specifically, the art of engraving small figures in relief: opposed to intaglio: as, a stone or shell cut in cameo; a vase ornamented in cameo.

n. engraving or carving in low relief on a stone (as in a brooch or ring)

"This cameo is the reason why Connery got bumped to the number two position on the list."

anaglyph   

in cameo    cameo incrustation   

lazuli    locket    bas-relief    lapidist    amethyst    mosaic    jewellery    medallion    rhinestone    jade