1. An alloy of silver and copper, with the object of reducing the bulk of the coins.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• biliion,
• billiion,
• billioin,
• bilion,
• billian,
• billion,
• billions,
• billonth,
• nillon,
• hillon,
• bjllon,
• bkllon,
• b9llon,
• b8llon,
• biklon,
• biplon,
• biolon,
• bilkon,
• bilpon,
• billeon

• bill,
• bellow,
• billows,
• bills,
• million,
• blown,
• billow,
• billion,
• bison,
• big on,
• billing,
• balloon.

The plural of the "Billon" can be the "billons".

The singular of the "Billon" can be the "Billon".