Interlocking wooden boards with a groove on one side and a ridge or tongue on the other.
Panel or board in which one is cut with projecting tongue to fit into corresponding groove in edge of next member.
A carpentry joint on a board or plank in which the jutting edge (tongue) of one board fits into the grooved end (groove) of another board. Typically used in hardwood flooring.
Lumber machined to have a groove on one side and a protruding tongue on the other so that pieces will fit snugly together, with the tongue of one fitting into the groove of the other.
A projection along the edge of a board inserted into a corresponding groove.
Wood pieces that join on edge with a groove in one piece and a corresponding tongue on the other to interlock. Commonly used on furniture doors for example.
In strip, plank, and parquet flooring and some mosaic parquet, a tongue is milled on one edge and a groove on the opposite edge. As the flooring is installed the tongue of each strip, slat, or unit, is engaged with the groove of the adjacent strip or unit. Nailing is usually done by "toe nailing" through the tongue.