QUADRATONE A printing process that uses varying concentrations of black ink instead of different colors such as CMYK (four-color process). The result is heightened midtone and shadow appearance in black and white images.
QUARRY TILE A large clay floor tile, usually unglazed.
QUARTER ROUND Wood or metal molding and trim which in profile is the equivalent of a quarter circle.
QUEUE An electronic holding area, usually in random access memory (RAM) or on a hard drive, where data is pooled and waits before being released sequentially for output.