\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}.