tricentenary
tricentennial (ˌtraɪsɛnˈtɛnɪəl)
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
Abbreviation: tercentenary, tercentennial
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
Examples from the Web for tricentenary
Historical Examples of tricentenary
Associated words: tercentenary, tricentenary, tri-centennial.
Putnam's Word BookLouis A. Flemming