Quadrennial

Word of the Day for Wednesday, February 29, 2012

quadrennial \kwo-DREN-ee-uhl\, adjective:

1. Occurring every four years.
2. Of or lasting for four years.

noun:
1. An event occurring every four years, as an anniversary or its celebration.

...all we merely have here is just what Rod might call an exaggerated example of a quadrennial problem any administration with vision is going to have to face eventually anyway.
-- David Foster Wallace, Infinite Jest

The inauguration of a President of the United States, I think, has always been treated as a great quadrennial ceremonial.
-- United States Senate, Subcommittee of the Committee on the District of Columbia, Suffrage Parade

Clearly, quadrennial comes from the Latin words quadri- meaning four and annus meaning years, with the suffix -ial meaning pertaining to.

Thanks to: http://www.dictionary.com/