Definition of quinquenniad in English:
quinquenniad
noun kwɪŋˈkwɛnɪadkwɪnˈkwɛnɪad
rare Origin
Mid 19th century; earliest use found in Alfred Tennyson (1809–1892), poet. From classical Latin quīnquennis five years old, lasting for five years, occurring every five years + -ad, after decad.