undecennaryadj.
rare.
Given, occurring, or observed every eleventh year, or once in every eleven years.
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the world > time > period > year > [adjective] > occurring every specific number of years
quinquennal1532
quinquennial1601
five-yearly1619
centenary1620
septennial1640
triannual1640
triennial1642
septennary1644
sexennial1646
trieterical1646
novennial1656
octennial1656
trieteric1656
quinquennalian1692
quadrenniala1700
biennial1750
sexennary1753
lustral1781
centennial1797
quaternal1813
sextennial1814
septendecennial1834
septemdecenary1843
undecennarya1847
bicentenary1862
bicentennial1883
quadricentennial1889
trigintennial1894
twelve-yearly1906
vigintennial1921
a1847 E. Stiles in Webster's New Internat. Dict. Eng. Lang. (1890) It appears from an undecennary account laid before Parliament.
Derivatives
(1864 Webster.)
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undeˈcennial adj.
This entry has not yet been fully updated (first published 1921; most recently modified version published online June 2021).
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adj.a1847