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

apple nut, areca nut, babassu nut, becuiba nut, ben nut, betel nut, bonduc nut, brazil nut, brush-footed butterfly, buffalo nut, butterfly, butterfly bush, butterfly collector, butterfly effect, butterfly fish, butterfly flower, butterfly orchid, butterfly orchis, butterfly pea, butterfly plant, butterfly ray, butterfly stroke, butterfly valve, butterfly weed, cabbage butterfly, cashew nut, cedar nut, cembra nut, cembra nut tree, chile nut, chilean nut, cohune nut, cola nut, comma butterfly, coquilla nut, coumara nut, danaid butterfly, dika nut, edible nut, elk nut, emperor butterfly, european nut pine, four-footed butterfly, ginger nut, goora nut, greater butterfly orchid, grugru nut, hairstreak butterfly, hex nut, hiccough nut, hiccup nut, hickory nut, ivory nut, jesuits' nut, king nut, king nut hickory, kola nut, kola nut tree, lesser butterfly orchid, litchi nut, lock nut, lycaenid butterfly, macadamia nut, macadamia nut tree, mexican nut pine, milkweed butterfly, mocker nut, monarch butterfly, monkey nut, mourning cloak butterfly, neckar nut, nickar nut, nicker nut, nut, nut and bolt, nut bar, nut bread, nut butter, nut case, nut grass, nut house, nut pine, nut sedge, nut tree, nymphalid butterfly, oil nut, packing nut, palm nut, par'a0 nut, para nut, peacock butterfly, penang nut, physic nut, pierid butterfly, pine nut, pinon nut, pistachio nut, quandong nut, queensland nut, ringlet butterfly, rush nut, safety nut, sawarra nut, sea butterfly, souari nut, southern cabbage butterfly, square nut, stuffing nut, sulfur butterfly, sulphur butterfly, tortoiseshell butterfly, troilus butterfly, vomic nut, wing nut