vigintennial
English edit
Etymology edit
From viginti- (“twenty”) + -ennial (“yearly”), from Latin vīgintī (“twenty”) and -enniālis, from annus (“year”) + -is (“forming compound adjectives”) + -ālis (“-al: forming adjectives”).
Adjective edit
vigintennial (not comparable)
References edit
- “vigintennial, adj.”, in OED Online , Oxford, Oxfordshire: Oxford University Press, launched 2000.