SEPTENDECILLION

[sep.ten.de.cil.lion] n, often attrib [L septendecim seventeen (fr. septem seven + decem ten) + E -illion (as in million)--more at ten] (ca. 1938): the figure 1 followed by 58 zeroes: the figure 1000 followed by 17 groups of three zeroes; also, Brit: the figure 1 followed by 102 zeroes: one million to the 17th power