What material is MDF?

It stannds for medium-density fiberboardand it is a type of wood

Medium-density fiberboard (MDF) refers to a type of manufactured composite board used to make furniture, doors, flooring and walls. The making of MDF began in the United States in 1966, according to the University of Tennessee. :)

If you want more type in things like history of MDF it will give you alot more