Search Result for "thumbnut": 
Wordnet 3.0

NOUN (1)

1. a threaded nut with winglike projections for thumb and forefinger leverage in turning;
[syn: wing nut, wing-nut, wing screw, butterfly nut, thumbnut]



WordNet (r) 3.0 (2006):

thumbnut
    n 1: a threaded nut with winglike projections for thumb and
         forefinger leverage in turning [syn: wing nut, wing-
         nut, wing screw, butterfly nut, thumbnut]