An accumulation of running water behind a barrier (see back, v. 22a).
| 单词 | θ2816 |
| 释义 | the world > the earth > water > body of water > [noun] > accumulation of water behind barrier (3) back-up1934 An accumulation of running water behind a barrier (see back, v. 22a). Subcategories:— forming a head (2) |
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