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Definition of Wing nut
1. Noun. Any tree of the genus Pterocarya; fruit is a small winged nutlet; Caucasus to southeastern Asia.
Exact synonyms: Wing-nut
Group relationships: Genus Pterocarya, Pterocarya
Specialized synonyms: Caucasian Walnut, Pterocarya Fraxinifolia
Generic synonyms: Nut Tree
Group relationships: Genus Pterocarya, Pterocarya
Specialized synonyms: Caucasian Walnut, Pterocarya Fraxinifolia
Generic synonyms: Nut Tree
2. Noun. A threaded nut with winglike projections for thumb and forefinger leverage in turning.
Definition of Wing nut
1. Noun. A nut with wing-like projections to provide leverage in turning; a thumbnut. ¹
2. Noun. (slang) One who advocates extreme measures or changes; a radical. ¹
¹ Source: wiktionary.com