Definition from Wiktionary, the free dictionary
rootstock (plural rootstocks)
- (agriculture) A healthy and vigorous-rooted plant that is used in grafting, most commonly as a sound base to support a scion that bears desirable fruit in orchard culture.
- (by extension) The necessary basis for something to develop
2009 January 30, Simon Jenkins, “For real secrets we already have the one-and-a-half-year memoir rule”, in The Guardian:
- We know more - vastly more - about how we are governed, and that knowledge is the rootstock of consent.
a healthy plant used as the base for grafting