Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Adjective: tricentenary  ,trI-sen'te-nu-ree or ,trI-sen'tee-nu-ree
  1. Of or relating to or completing a period of 300 years
    "His first official engagement in Scotland took place in the late spring of 1903, the tricentenary of the Union of the Crowns";
    - tricentennial