— centillionth , adj. , n.
/sen til"yeuhn/ , n. , pl. centillions , ( as after a numeral ) centillion , adj.
n.
1. a cardinal number represented in the U.S. by 1 followed by 303 zeros, and in Great Britain by 1 followed by 600 zeros.
adj.
2. amounting to one centillion in number.
[ 1850-55; cent ( um ) 100 + -illion (as in million, billion, etc.) ]