| n. | 1. | (Bot.) A perennial underground stem, producing leafly s ems or flower stems from year to year; a rhizome. |
| Noun | 1. | rootstock - a horizontal plant stem with shoots above and roots below serving as a reproductive structure |
| 2. | rootstock - root or part of a root used for plant propagation; especially that part of a grafted plant that supplies the roots |
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