The story
- Latin · derived fromsesquiennium
- English todaysesquiennial
From Latin sesquiennium (compare sesqui- and biennial).
Etymology from Wiktionary, CC BY-SA 4.0.
sesquiennial
Today it means: Occurring once every one and a half years (i.e. once every 18 months, or twice every three years); sesquiannual. Full definition →
Latin sesquiennium