Definition of rootstock
1 : a rhizomatous underground part of a plant
2 : a stock for grafting consisting of a root or a piece of root; broadly : stock 3b
First Known Use of rootstock
Learn More about rootstock
Britannica.com: Encyclopedia article about rootstock
Seen and Heard
What made you want to look up rootstock? Please tell us where you read or heard it (including the quote, if possible).