Engineered wood, also called composite wood, includes a range of derivative wood products which are manufactured by binding together wood strands, particles, fibers, or veneers with adhesives to form composite materials.
http://en.wikipedia.org/wiki/Engineered_wood

Medium-density fibreboard (MDF or MDFB) is an engineered wood product formed by breaking down softwood into wood fibres, often in a defibrator, combining it with wax and resin, and forming panels by applying high temperature and pressure.
http://en.wikipedia.org/wiki/Medium-density_fibreboard