1. 
   Tercentenary
   Ter·cen'te·na·ry adjective [ Latin ter thirce + English centenary .] Including, or relating to, an interval of three hundred years. -- noun The three hundredth anniversary of any event; also, a celebration of such...
   Found op http://www.encyclo.co.uk/webster/T/28
   
   
2. 
   Tercentenary
   • (a.) Including, or relating to, an interval of three hundred years. • (n.) The three hundredth anniversary of any event; also, a celebration of such an anniversary.
   Found op http://thinkexist.com/dictionary/meaning/tercentenary/
   
   
3. 
   tercentenary
   tercentenary 1. A year, or an exact day, 300 years after an event, usually one of special historic significance. 2. Coinciding with the 300th anniversary of an event, and often celebrating or commemorating the event.
   Found op http://www.wordinfo.info/words/index/info/view_unit/2115/
   
   
4. 
   tercentenary
   1) Anniversary 2) Day of remembrance 3) Tercentennial 4) Triennial
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/tercentenary/1
   
   

Tip: double click on a word to show its meaning.