tricentenary
tri·cen·te·nary
adjective
1.
of or relating to or completing a period of 300 years
Origin
From tri- + centenary.
Related words
Pertaining to
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.