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

Example:
Tea cups with a Cameo on the bottom?

Taxonomy
cameos, cameo appearance, appearance, films, cameo roles, actor, celebrity cameos, character, Directors, actor Danny Glover, free encyclopedia, novel, movies, audiences, remake, feature actors, celebrities, non-speaking.

Defination from the web:
cameo can establish a character as being important without having much screen time. ... Sometimes a cameo features a historical person who "drops in" on fictional characters in a historical novel, as when Benjamin Franklin shares a ...