'rootage' definitions:

Definition of 'rootage'

(from WordNet)
noun
Fixedness by or as if by roots; "strengthened by rootage in the firm soil of faith"
noun
A developed system of roots [syn: rootage, root system]
noun
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" [syn: beginning, origin, root, rootage, source]