noun
1. any tree of the genus Pterocarya; fruit is a small winged nutlet; Caucasus to southeastern Asia
• Syn: ↑wing nut
• Hypernyms: ↑nut tree
• Hyponyms: ↑Caucasian walnut, ↑Pterocarya fraxinifolia
• Member Holonyms: ↑Pterocarya, ↑genus Pterocarya
2. a threaded nut with winglike projections for thumb and forefinger leverage in turning
• Syn: ↑wing nut, ↑wing screw, ↑butterfly nut, ↑thumbnut
• Hypernyms: ↑nut
Useful english dictionary. 2012.