What is the meaning of Duodecennial?

(a.) Consisting of twelve years.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). Duodecennial. Retrieved September 29, 2026, from http://smartdefine.org/duodecennial/definitions/2001019
ChicagoWebster's. 2011. "Duodecennial" http://smartdefine.org/duodecennial/definitions/2001019 (accessed September 29, 2026).
HarvardWebster's 2011, Duodecennial, Smart Define, viewed 29 September, 2026, <http://smartdefine.org/duodecennial/definitions/2001019>.
MLAWebster's. "Duodecennial" 27 May 2011. Web. 29 September 2026. <http://smartdefine.org/duodecennial/definitions/2001019>