noun.
Any carving or art-work in relief, as distinguished from engraved incised work, or intaglio.
noun.
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.