trademark engineering a taper that is one of a standard series used in the shank of tools to fit a matching taper in the mandrel of a machine tool
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What Is Whisky Tango Foxtrot And Other Army LingoGiven the size and manpower of the US Army, it's no surprise that its lingo has gradually invaded everyday conversation. Not many of us keep a Purple Heart framed on our desk, though (i.e., we have no idea what these words and phrases mean even though we hear them all the time).
Word Origin for Morse taper
probably named after the Morse Twist Drill Co, Massachusetts, US
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