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mitre square

British  

noun

  1. a tool with two blades that are at a fixed angle to one another, used to bevel a mitre joint

"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

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“The Curse Upon Mitre Square” is a novelette inspired by one of the Ripper killings and published by John Francis Brewer as early as October 1888.

From Salon