quadrennial
quadrennial (or quadrienn.):
I. Lasting 4 years: quadrĭennis, e: Aur. Vict. Epit. 45.
II. Recurring every 4th year (i. e. at intervals of 4 years), in our mode of computation, is, in the Roman mode, quinquennālis, e: cf. Cic. de Or. 3, 32, 127, quinq. celebritas (sc. ludorum Olympicorum). (N.B. The form quadriennalis is not found.)
I. Lasting 4 years: quadrĭennis, e: Aur. Vict. Epit. 45.
II. Recurring every 4th year (i. e. at intervals of 4 years), in our mode of computation, is, in the Roman mode, quinquennālis, e: cf. Cic. de Or. 3, 32, 127, quinq. celebritas (sc. ludorum Olympicorum). (N.B. The form quadriennalis is not found.)