trigintennial

English

Etymology

From Latin triginta (“thirty”) + -ennial, combining adjectival form of annus (“year”). Compare the actual Latin term tricennium.

Adjective

trigintennial (not comparable)

1. (uncommon) Synonym of tricennial, once every thirty years.

References

• “trigintennial, adj.”, in OED Online ⁠, Oxford, Oxfordshire: Oxford University Press, launched 2000.