Search Result for "one-billionth": 
Wordnet 3.0

NOUN (1)

1. one part in a billion equal parts;
[syn: one-billionth, billionth]



WordNet (r) 3.0 (2006):

one-billionth
    n 1: one part in a billion equal parts [syn: one-billionth,
         billionth]