— quindecillionth , adj. , n.
/kwin'di sil"yeuhn/ , n. , pl. quindecillions , ( as after a numeral ) quindecillion , adj.
n.
1. a cardinal number represented in the U.S. by 1 followed by 48 zeros, and in Great Britain by 1 followed by 90 zeros.
adj.
2. amounting to one quindecillion in number.
[ 1900-05; quindec ( im ) fifteen + -illion (as in million ) ]