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American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Tools) a nut with projections enabling it to be turned by the thumb and forefinger; wing nut
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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|Noun||1.||thumbnut - a threaded nut with winglike projections for thumb and forefinger leverage in turning|
nut - a small (usually square or hexagonal) metal block with internal screw thread to be fitted onto a bolt
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