mitre joint; miter joint
A woodworking joint where two pieces are cut at an angle and joined, typically at a corner. Both 'mitre' (UK) and 'miter' (US) spellings are used.
The corners of the picture frame are finished with mitre joints.
Compound of 留め (tome, 'stopping, fixing') and 継ぎ (tsugi, 'joining, splicing'), referring to a joint that fixes two pieces together at an angle.