| Sexennial | a. [ L. sexennium a period of six years, sexennis of six years; sex six + annus a year. See Six, and Annual. ] Lasting six years, or happening once in six years. -- |
| Sexennially | adv. Once in six years. [ 1913 Webster ] |
| 六箇年;六カ年;六ヵ年;六ヶ年;六か年 | [ろっかねん, rokkanen] (adj-pn) sexennial [Add to Longdo] |