The action of moving (wings) up and down.
| 单词 | θ106159 |
| 释义 | the world > movement > motion in specific manner > alternating or reciprocating motion > [noun] > flapping or beating up and down (6) flapping1398 The action of moving (wings) up and down. winnowing1844 Of wings, etc.: see winnow, v. 3. Chiefly poetic. flip-flopping1897 Subcategories:— instance of (3) |
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