wing nut

wing nut

noun
a nut having two flat, widely projecting pieces such that it can be readily tightened with the thumb and forefinger.
Also, wingnut.
Also called butterfly nut, thumbnut.


Origin:
1895–1900

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
wing nut
 
n
Also called: butterfly nut a threaded nut tightened by hand by means of two flat lugs or wings projecting from the central body

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Britannica
Encyclopedia

wing nut

(genus Pterocarya), any of about six species of Asian trees of the walnut family (Juglandaceae). They often are 30 m (about 100 feet) tall and bear winged, edible, one-seeded nuts. One species, P. stenoptera, is planted as an ornamental. The wood of some species is used in cabinetmaking.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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