noun, plural octodecillions (as after a numeral) octodecillion.
a cardinal number represented in the U.S. by 1 followed by 57 zeros, and in Great Britain by 1 followed by 108 zeros.
amounting to one octodecillion in number.
Origin: Related forms
1935–40; < Latin octōdec(im) eighteen + English -illion, as in million
octodecillionth, adjective, noun