Billion

A billion is equal to 109 or 1,000,000,000 in short scale Chuquet nomenclature. In the long scale, this number is called milliard. This system is rare in English but used in French and German.

Other names for this number are gillion (from giga-, in Rowlett's Greek-based system), and naniad and gigund which are fabricated terms appearing on various googological dumpsterbins. Like the million, it is often used as a hyperbole. Username5243 calls this number goonvol, and it's equal to 10[1]9 in UNAN.

Etymology
The name is derived from the Latin prefix bi-, meaning 2, and the suffix -illion.

Examples

 * Based on Jeremy Harper's 89-day-long count to a million, we can estimate that it would take more than 243 years to count to a billion, assuming sixteen hours are allocated for counting every day.
 * The planet Uranus's surface area covers 8.1156 billion square km.
 * The Big Bang occurred 13.8 billion years ago.
 * The SI prefix giga- multiplies by one billion.

In googology
A billion is used in the definition of duminex and billiplexion.