De·cen·ni·um n.; pl. Decenniums L. Decennia A period of ten years. “The present decennium.” --Hallam. “The last decennium of Chaucer's life.” ◄ ►
decennia See decennium
decennium n : a period of 10 years [syn: decade, decennary] [also: decennia (pl)]