| 释义 |
ˈroot-stock
[f. root n.1]
1. Bot. A rhizome; a stem that grows entirely underground; a creeping stem.
1832Planting 132 in Husb. III. (L.U.K.), Fourteen large trees, growing from the same root-stock. 1861Mrs. Lankester Wild Flowers 43 The Large-flowered Hypericum, or St. John's Wort,..has a creeping, woody rootstock. 1877F. G. Heath Fern World 21 The lower leafy portion of the frond almost touches the crown of the root-stock.
2. A source from which offshoots have arisen; a primitive form.
1877Dawson Orig. World xiii. 272 The Egyptians being.., if languages have one origin, likely to be near its root-stock. 1888Clodd Story of Creation (1894) 128 Whether there was an ancestral form or rootstock from which both reptile and mammal branched off..is not clear.
3. A stock on to which another variety has been grafted or budded.
1933H. H. Thomas Pop. Encycl. Gardening 392/1 The shoot of the required variety is united with a suitable rootstock or with a branch of an established tree of the same kind. 1954A. G. L. Hellyer Encycl. Garden Work 208/2 An apple may be described as grafted upon paradise rootstock. 1969P. Thrower Every Day Gardening iv. 84/2, I keep a close lookout throughout the season for suckers growing from the roots below the union of the rose and the rootstock. |