"quadrillions" in the noun sense
1. quadrillion
the number that is represented as a one followed by 24 zeros
"in England they call a septillion a quadrillion"
2. quadrillion
the number that is represented as a one followed by 15 zeros
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License