Noun has 2 senses

• wing nut(n = noun.plant) wing-nut - any tree of the genus Pterocarya; fruit is a small winged nutlet; Caucasus to southeastern Asia;




• wing nut(n = noun.artifact) butterfly nut, thumbnut, wing screw, wing-nut - a threaded nut with winglike projections for thumb and forefinger leverage in turning;