— octodecillionth , adj. , n.
/ok'toh di sil"yeuhn/ , n. , pl. octodecillions , ( as after a numeral ) octodecillion , adj.
n.
1. a cardinal number represented in the U.S. by 1 followed by 57 zeros, and in Great Britain by 1 followed by 108 zeros.
adj.
2. amounting to one octodecillion in number.
[ 1935-40; octodec ( im ) eighteen + E -illion, as in million ]