Definify.com
Webster 1913 Edition
Sextillion
Sex-til′lion
,Noun.
[Formed (in imitation of
million
) fr. L. sextus
sixth, sex
six: cf. F. sextilion
.] According to the method of numeration (which is followed also in the United States), the number expressed by a unit with twenty-one ciphers annexed. According to the English method, a million raised to the sixth power, or the number expressed by a unit with thirty-six ciphers annexed. See
Numeration
.