wing-nut

Definitions of wing-nut

1. noun

   any tree of the genus Pterocarya; fruit is a small winged nutlet; Caucasus to southeastern Asia
   synonyms: wing nut

   types:

   Caucasian walnut, Pterocarya fraxinifolia

   medium-sized Caucasian much-branched tree distinguished from other walnut trees by its winged fruit

   type of:

   nut tree

   tree bearing edible nuts
2. noun

   a threaded nut with winglike projections for thumb and forefinger leverage in turning
   synonyms: butterfly nut, thumbnut, wing nut, wing screw

   type of:

   nut

   a small (usually square or hexagonal) metal block with internal screw thread to be fitted onto a bolt