Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of octillion is as below...

Octillion :: Octillion (n.) According to the French method of numeration (which method is followed also in the United States) the number expressed by a unit with twenty-seven ciphers annexed. According to the English method, the number expressed by a unit with forty-eight ciphers annexed. See Numeration..

Nonillion :: Nonillion (n.) According to the French and American notation, a thousand octillions, or a unit with thirty ciphers annexed; according to the English notation, a million octillions, or a unit with fifty-four ciphers annexed. See the Note under Numeration..

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