vigentennial
adjective
vi·gen·ten·ni·al
| \ ¦vījen‧¦tenēəl\
Definition of vigentennial
(Entry 1 of 2)
: occurring once every 20 years : relating to a 20th anniversary
vigentennial
noun
\ "\
plural -s
Definition of vigentennial (Entry 2 of 2)
: a 20th anniversary or its celebration
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