Noun
wallboard composed of wood chips or shavings bonded together with resin and compressed into rigid sheets
Source: WordNetSubwoofers are typically constructed by mounting one or more woofers in a cabinet of medium-density fibreboard (MDF), oriented strand board (OSB), plywood, fiberglass, aluminum or other stiff materials. Source: Internet
Typically the drafting board surface is a thick sheet of compressed fibreboard with sheets of Formica laminated to all its surfaces. Source: Internet