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Woodruff key

noun, Machinery
1.
a key having the form of a nearly semicircular disk fitting into a recess in a shaft.
Origin
apparently after the proper name
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for woodruff-key

Woodruff key

/ˈwʊdrʌf/
noun (engineering)
1.
a semicircular key restrained in a curved keyway in a shaft
Word Origin
C19: named after the Woodruff Manufacturing Co, in Hartford, Connecticut, who first manufactured it in 1892
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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