matchboard

A board cut with a tongue on one side and a matching groove on the other to fit with similarly cut boards.

In carpentry, a board which has a tongue cut along one edge and a groove in the opposite edge, to enter the corresponding groove and receive the corresponding tongue of the boards to be placed in contiguity with it. Such boards are always planed smooth on one or both faces. Also called matched board.

A board that has a groove cut into one edge and a tongue cut into the other so they fit tightly together (as in a floor); see match boarding.

a board that has a groove cut into one edge and a tongue cut into the other so they fit tightly together (as in a floor)