- a key having the form of a nearly semicircular disk fitting into a recess in a shaft.
Origin of Woodruff key
apparently after the proper name
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a semicircular key restrained in a curved keyway in a shaft
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