mitre joint
noun
a corner joint formed between two pieces of material, esp wood, by cutting bevels of equal angles at the ends of each pieceSometimes shortened to: mitre
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012