ˈ ̷ ̷ˌ ̷ ̷ noun
or matched board
1. : a board (as one of those used in laying floors) that has a groove cut along one edge and a tongue along the other so as to fit snugly with the edges of similarly cut boards of identical size
2. : one of two molding boards to which the halves of a split foundry pattern are attached with one of the molding boards forming the cope mold and the other the drag mold