1. 
   perennation
   [n] - the process of living through a number of years (as a perennial plant)
   Found op http://www.webdictionary.co.uk/definition.php?query=perennation
   
   
2. 
   perennation
   Survival of a plant for a number of years. ... To live over from season to season. ... (09 Oct 1997) ...
   Found op http://www.mondofacto.com/facts/dictionary?perennation
   
   
3. 
   perennation
   noun the process of living through a number of years (as a perennial plant)
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=perennation
   
   
4. 
   Perennation
   The survival of an individual plant, or of a dormant plant organ, over successive years or during unfavourable seasons.
   Found op http://www.knotweed-uk.com/Glossary.htm
   
   
5. 
   perennation
   1) Biological process 2) Organic process
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/perennation/1
   
   

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