— duodecillionth , n. , adj.
/dooh'oh di sil"yeuhn, dyooh'-/ , n. , pl. duodecillions , ( as after a numeral ) duodecillion , adj.
n.
1. a cardinal number represented in the U.S. by 1 followed by 39 zeros, and in Great Britain by 1 followed by 72 zeros.
adj.
2. amounting to one duodecillion in number.
[ 1910-15; duodec ( im ) twelve + -illion, as in million ]