1.  wing nut(n = noun.plant) wing-nut - any tree of the genus Pterocarya; fruit is a small winged nutlet; Caucasus to southeastern Asia;
is a kind of nut tree
is a member of genus pterocarya, pterocarya
has particulars: caucasian walnut, pterocarya fraxinifolia

2.  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;
is a kind of nut

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