Definition of octodecillion
US : a number equal to 1 followed by 57 zeros — see number table; also, British : a number equal to 1 followed by 108 zeros — see number table
People Are Reading
Origin and Etymology of octodecillion
Latin octodecim eighteen + English -illion (as in million)
Learn More about octodecillion
Seen and Heard
What made you want to look up octodecillion? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!