tongue-and-groove joint

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tongue-and-groove joint

n
1. (Building) a joint made between two boards by means of a tongue along the edge of one board that fits into a groove along the edge of the other board

tongue′-and-groove′ joint`


n.
a joint between two boards in which a raised area on the edge of one board fits into a corresponding groove in the edge of the other.
[1875–80]