1875 E. H. Knight III. 2478/2 Table-leaf Joint, a peculiar form of furniture joint used in desk and table leaves, rules, and in some kinds of shutters.
1941 24 Aug. i. 8/2 Many American tables had what is known as the ‘V’ joint or tongue and groove, rather than the standard table leaf joint.
1997 G. Hack xi. 210 Actually making a properly fitting table-leaf joint is quite subtle.