rootage in WordNet English dictionary

1. the place where something begins, where it springs into being
   "the Italian beginning of the Renaissance"; "Jupiter was the origin of the radiation"; "Pittsburgh is the source of the Ohio River"; "communism's Russian root"
   beginning  origin  root  rootage  source 
   
2. a developed system of roots
   rootage  root system 
   
3. fixedness by or as if by roots
   "strengthened by rootage in the firm soil of faith"
   rootage