a key having the form of a nearly semicircular disk fitting into a recess in a shaft.
What Does 🔑 Key Emoji Mean?Not to be confused with the old key emoji ... the key emoji depicts a single key, and it's presented in varying shades of brass and silver on various platforms.
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Origin of Woodruff key
apparently after the proper name
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
/ (ˈwʊdrʌf) /
a semicircular key restrained in a curved keyway in a shaft
Word Origin for Woodruff key
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