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Definition of: undecennial

(un′di·senē·əl) adjective
1. Pertaining to a period of eleven years or to the eleventh year.
2. Lasting eleven years, or occurring or celebrated on the eleventh year or every eleven years. Also unde·cen′na·ry (-senər·ē). [<L undecim eleven + annus year]

Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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