octocentennialadj.n.
/ˌɒktə(ʊ)s(ɛ)nˈtɛnɪəl/, U.S. /ˈˌɑktoʊsənˈtɛniəl/ A. adj.
Relating to or connected with an eight-hundredth anniversary.
ΘΚΠ
the world > time > particular time > an anniversary > [adjective] > of a specific anniversary
jubilar1613
centenary1620
jubilean1624
centenarious1727
tercentenary1844
semi-centennial1859
quatercentenary1877
quincentenary1878
tricentenary1882
tricentennial1883
quincentennial1884
quingentenary1884
tercentennial1884
octocentenary1888
octocentennial1889
septcentenary1889
quinquagenary1933
quatercentennial1937
quasquicentennial1962
1889 Times 19 June 7/2 The celebration of its octocentennial day of honour.
1941 Jrnl. Philos. 38 (end matter) (advt.) Essays on Maimonides: An octocentennial volume.
B. n.
An eight-hundredth anniversary; a celebration of such an anniversary.
ΘΚΠ
the world > time > particular time > an anniversary > [noun] > specific anniversaries
jubileec1386
quinquagenary1588
centenary1661
millennium1664
secular1706
coming of age1788
centennial1791
tricentenary1846
tercentenary1855
quinquennial1857
ter-millenary1864
sexcentenary1865
semi-centenary1870
bicentenary1872
septcentenary1873
quincentenary1877
sesquicentennial1880
quadricentennial1882
bicentennial1883
quatercentenary1883
tricentennial1883
tercentennial1884
quincentennial1885
octocentenary1888
quadrennial1890
quingentenary1892
octingentenary1893
ruby anniversary1893
semi-jubilee1893
septingentenary1893
millennial1896
millenary1897
quadringenary1905
quingenary1911
bimillenary1961
sesquicentenary1961
quasquicentennial1962
nongenary1966
octocentennial1994
1994 Speculum 69 182 The octocentennial of John of Salisbury's death in 1980 sparked a small explosion of..articles on his work.
This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).
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adj.n.1889