Conceptual Art  An art form in which the originating idea and the process by which it is presented take precedence over a tangible product. Conceptual works are sometimes produced in visible form, but they often exist only as descriptions of mental concepts or ideas. This trend developed in the late 1960s, in part as a way to avoid the commercialization of art.

Complementary Colors  Two hues directly opposite one another on a color wheel which, when mixed together in proper proportions, produce a neutral gray. The true complement of a color can be seen in its afterimage.

Divisionism See pointillism. 

Cantilever  A beam or slab projecting a substantial distance beyond its supporting post or wall; a projection supported at only one end.

Carving  A subtractive process in which a sculpture is formed by removing material from a block or mass of wood, stone, or other material, using sharpened tools.