Quinquennial
Pronunciation : Quin*quen"ni*al
Part of Speech : a.
Etymology : [L. quinquennalis and quinquennis; quinque five + annus year. See Five, and cf. Biennial.]
Definition : Defn: Occurring once in five years, or at the end of every five years; also, lasting five years. A quinquennial event.
Source : Webster's Unabridged Dictionary, 1913