— decillionth , adj. , n.
/di sil"yeuhn/ , n.
1. a cardinal number represented in the U.S. by 1 followed by 33 zeros, and in Great Britain by 1 followed by 60 zeros.
adj.
2. amounting to one decillion in number.
[ 1835-45; dec ( em ) TEN + -illion, as in million ]