音标:英 [ru:ts'tɒk]美 [ru:ts'tɒk]
根茎, 根源, 起源[医] 根茎
root or part of a root used for plant propagation; especially that part of a grafted plant that supplies the roots
1. We graft all our trees from the original rootstock.
我们所有的果树都是从种根上移植而来的