wing nut

noun

1. 翼形螺母；元宝螺母；蝶形螺帽
   a nut(2) for holding things in place, which has parts that stick out at the sides so that you can turn it easily

1. A wing nut is a nut with wings.
   蝶形螺母是一种翼状物的螺母。
2. The behavioral responses of adults Helicoverpa armigera ( H ü bner) to the odors of wilted leaves ( OWL) of Chinese wing nut tree, Pterocarya stenoptera were tested by using an olfactometer.
   利用嗅觉仪测定了棉铃虫Helicoverpaarmigera（H櫣bner）成虫对萎蔫的枫杨Pterocaryastenoptera气味的行为反应。

noun

1. a threaded nut with winglike projections for thumb and forefinger leverage in turning

   Synonym:    wing-nutwing screwbutterfly nutthumbnut

2. any tree of the genus Pterocarya

   Synonym:    wing-nut