There is a multiple-element prism used in optics just for dispersing light by color, while allowing the light to pass straight through (for some middle wavelength like 515 nm). It is long and of rectangular or square cross section, and has entry and exit faces at the ends. The light travels along the long axis. There are alternating wedges of glass cemented together, the wedges having similar indices of refraction but very different indices of dispersion. Since indices of dispersion don’t really vary all that much in absolute terms, this prism gives a fairly small dispersion for such a large and expensive piece of glass, but it has its uses. I know that it is used in some handheld spectroscopes, and I saw them advertised in a catalog once, and have certainly seen diagrams of them, but can’t find any of that now. I thought it was called a “Nicole prism”, but that is just one of several similar-looking polarizing prisms. Though it only has two elements, a Nicole prism does look like a short and simple version of the thing I’m talking about.