tercentenary

Postmaster-General Lemieux has given instructions to issue a series of postage stamps commemorating the tercentenary.
The Stamps of Canada|Bertram Poole
Harrovians came from every corner of the globe to take part in this Tercentenary Festival.
Fifteen Chapters of Autobiography|George William Erskine Russell
However, as a popular tercentenary tribute to "our Shakspeare" the scheme is to be commended and was as such approved.
Punch, or the London Charivari, Vol. 152, January 3, 1917|Various
The Musicians have recently celebrated their tercentenary, commemorating the granting of their charter by James I. in 1604.
Memorials of Old London|Various

In the year 1864 a prize was offered for the best poem on the tercentenary of the birth of Shakespeare.
Cornish Characters|S. Baring-Gould

British Dictionary definitions for tercentenary

tercentenary

tercentennial

/ (ˌtɜːsɛnˈtiːnərɪ) /

adjective

of or relating to a period of 300 years

of or relating to a 300th anniversary or its celebration

noun plural -tenaries or -tennials

an anniversary of 300 years or its celebration

Also called: tricentennial

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012