biennium means A period of two years, particularly for purposes involving intercalation or fiscal calculations. Lexicurio rates it Sui generis — a strength score of 85 out of 100.
biennium is pronounced /baɪˈɛn.i.əm/.
noun
- A period of two years, particularly for purposes involving intercalation or fiscal calculations.“The Greeks being taught by their Oracles, that their accuſtomed Sacrifices were to be offered κατά τρία, which they underſtood as if their Year were to be regulated by the Sun, and their Days and Months were to be adjuſted by the motion of the Moon; were always ſolicitous, how by certain Periods they might reduce the diſagreeing motions of the Luminaries to a Third ſomething in which they might ag”