noun, plural quindecillions (as after a numeral) quindecillion.
a cardinal number represented in the U.S. by 1 followed by 48 zeros, and in Great Britain by 1 followed by 90 zeros.
amounting to one quindecillion in number.
Origin: Related forms
1900–05; < Latin quīndec(im) fifteen + -illion (as in million)
quindecillionth, adjective, noun