dimensional lumber

dimensional lumber (usually uncountable, plural dimensional lumbers)

1. (chiefly Canada, US) Lumber that is finished (milled or planed) and cut to standardized width and depth; in some countries the nominal sizes differ from the actual sizes in well-established ways (for example, in the United States, a two by four is nominally 2 inches by 4 inches and is actually 1½ by 3½ inches).

   Synonym: dimension lumber

   Hypernyms: lumber, timber < wood < material, supplies

Use of the noun lumber for sawmill products is chiefly North American. Outside of North America, dimensional lumber is likelier to be called sawn timber.