名詞 rootstock:

1. a horizontal plant stem with shoots above and roots below serving as a reproductive structure
   同義詞：rhizome, rootstalk
2. root or part of a root used for plant propagation; especially that part of a grafted plant that supplies the roots

root.stock

n.（名詞）
See rhizome
參見 rhizome
A root or part of a root used as a stock for plant propagation.
根狀莖，砧木：作為植物繁殖的根莖或砧木
A source or origin.
根源或起源