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Definition of Undecennary
1. a. Occurring once in every period of eleven years; undecennial.
2. a. Occurring once in every period of eleven years; undecennial.
Definition of Undecennary
1. Adjective. Once every eleven years; undecennial. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Undecennary
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