Something resembling a nail. A hard excrescence on the upper mandible of some geese and ducks. Also: any of various hard or horny structures in…
| 单词 | θ38731 |
| 释义 | the world > animals > birds > parts of or bird defined by > [noun] > beak or bill > upper or lower beak > part or process of upper beak (4) nail1769 Something resembling a nail. A hard excrescence on the upper mandible of some geese and ducks. Also: any of various hard or horny structures in… tooth1847 transferred. A projecting part or point resembling an animal's tooth; esp. one of a row or series of… As a natural structure, in animals, plants… prokinesis1962 A form of upper jaw mobility, found in some birds and lizards, in which the upper jaw may be raised relative to the neurocranium by rotation about a… rhynchokinesis1963 A form of upper jaw mobility, found in some birds, in which the terminal part of the upper jaw may be raised or lowered independently of the rest… |
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