Synonyms: one-quintillionth, quintillionth
Definition: one part in a quintillion equal parts
Similar words: common fraction, simple fraction
Definition: the quotient of two integers
Synonyms: quintillionth
Definition: the ordinal number of one quintillion in counting order
Similar words: ordinal
Definition: being or denoting a numerical order in a series
Usage: ordinal numbers; held an ordinal rank of seventh