Oc*til"lion (?), n. [L. octo eight + -illion, as in E. million: cf. F. octillion.]
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.
© Webster 1913.