Rebated and Filleted Joint
A joint made so that the space created by the shrinkage of wood is filled by the fillet, preventing air and dust from penetrating in between the boards.
GalleriesCarpentry and Woodworking
John H. Finley ed. Nelson's Perpetual Loose-Leaf Encyclopaedia (vol. 7) (New York, NY: Thomas Nelson and Sons, 1917) 13