Decennium
Pronunciation : De*cen"ni*um, n.; pl. Decenniums
Part of Speech : L.
Etymology : [L.]
Definition : Defn: A period of ten years. "The present decennium." Hallam. "The last decennium of Chaucer's life." A. W. Ward.
Decennia.
Source : Webster's Unabridged Dictionary, 1913