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quadrat
quadrate
quadratic
quadratic equation
quadratics
quadrature
quadrennia
quadrennial
quadrennium
quadri-
quadric
quadricentennial
quadriceps
quadriga
quadrilateral
quadrilateral meeting
quadrille (1)
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quadrennium

quad·ren·ni·um [ kwo drénnee əm ] (plural quad·ren·ni·ums or quad·ren·ni·a [ kwod rénnee ə ])


noun 
Definition:
 
four years: a period of four years

[Early 19th century. < Latin quadriennium< quadri- "four" + annus "year"]
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