Search Result for "billionth": 
Wordnet 3.0

NOUN (2)

1. position 1,000,000,000 in a countable series of things;

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


ADJECTIVE (1)

1. the ordinal number of one billion in counting order; 



WordNet (r) 3.0 (2006):

billionth
    adj 1: the ordinal number of one billion in counting order
    n 1: position 1,000,000,000 in a countable series of things
    2: one part in a billion equal parts [syn: one-billionth,
       billionth]