1. The number equal to 10 to the 303rd power in the short scale (U.S. and modern British usage); in the long scale, 10 to the 600th power.
Usage: mathematics; The short scale is standard in U.S. English; the long scale is used in some European countries.

Examples

• A centillion is an incomprehensibly large number used mainly in theoretical mathematics.
• In the short scale, a centillion is written as 1 followed by 303 zeros.
• The term centillion rarely appears outside of academic mathematics discussions.
• Astronomers sometimes reference centillions when discussing hypothetical particle counts in the universe.