Search Result for "quintillionth": 
Wordnet 3.0

NOUN (1)

1. one part in a quintillion equal parts;
[syn: one-quintillionth, quintillionth]


ADJECTIVE (1)

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



WordNet (r) 3.0 (2006):

quintillionth
    adj 1: the ordinal number of one quintillion in counting order
    n 1: one part in a quintillion equal parts [syn: one-
         quintillionth, quintillionth]