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biscuit joint

noun

Definition of biscuit joint 

woodworking

: a joint made by gluing one or more wood biscuits (see biscuit sense 8) in between two boards Where a timber post supports a roof joist, the two are mitred and glued together with a biscuit joint. — Building Design, 26 Oct. 2007

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First Known Use of biscuit joint

1988, in the meaning defined above

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