anaglyph

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. An ornament carved in low relief.
2. n. A moving or still picture consisting of two slightly different perspectives of the same subject in contrasting colors that are superimposed on each other, producing a three-dimensional effect when viewed through two correspondingly colored filters.

Century Dictionary and Cyclopedia

1. n. Any carving or art-work in relief, as distinguished from engraved incised work, or intaglio. The term is most generally applied to works in precious metal or to gems, but it is also applied to ordinary reliefs in stone, etc. Also called anaglypton.
2. n. In photography, a kind of picture, invented by Ducos du Hauron, with two images printed nearly in superposition, one in red and the other in greenish blue. On viewing this double image through a pair of eye-glasses, one blue and the other red, the image is seen stereoscopically. On reversing the glasses the opposite effect, or pseudoscopic vision, is the result. Three-color heliochromy has also been applied to the anaglyph. When two slides from a stereoscopic negative, one with a red image and the other with a blue, are projected on a screen together, they appear stereoscopically when viewed through colored glasses.

Wiktionary

1. n. A decorative ornament worked in low relief or bas relief, such as a piece of cameo jewelry.
2. n. A matched pair of images designed to produce a three-dimensional effect when viewed using spectacles that have usually one red and one bluish-green lens, corresponding to the colors of the pairs of images.

GNU Webster's 1913

1. n. Any sculptured, chased, or embossed ornament worked in low relief, as a cameo.

WordNet 3.0

1. n. anything carved in low relief
2. n. moving or still pictures in contrasting colors that appear three-dimensional when superimposed