Bible Dictionaries
Vicennial

Webster's Dictionary

(1):

(a.) Lasting or comprising twenty years.

(2):

(a.) Happening once in twenty years; as, a vicennial celebration.

Bibliography Information
Webster, Noah. Entry for 'Vicennial'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​v/vicennial.html. 1828.