Get the FREE one-click dictionary software for Windows
or the iPhone/iPad and Android apps
Adjective: quintillionth
  1. The ordinal number of one quintillion in counting order
    "The quintillionth atom in the sample was analysed"
Noun: quintillionth
  1. One part in a quintillion equal parts
    "The experiment measured changes at the one-quintillionth scale";
    - one-quintillionth

Derived forms: quintillionths

See also: ordinal

Type of: common fraction, simple fraction, vulgar fraction [Brit]

Encyclopedia: Quintillionth