Billennium

From Wikipedia, the free encyclopedia

An editor has expressed concern that this article may be documenting a neologism. This new term needs more reliable sources.

Billennium is a neologism which is a combination either of "billion" and "millennium", that is a period of a billion years, or a combination of "bi-" and "millennium", that is a second millennium, such as that which ended in the year 2000.

The word "billennium" is used by such writers as Madeleine L'Engle (A Wind in the Door), Stanisław Lem (Imaginary Magnitude) and J. G. Ballard in a collection of short stories under the same name, apparently in reference to a billion years.

See also:

• Unix billennium
• Beretta 92 Billennium

The word "billennium" should not be confused with "biennium", a period of two years.