The ‘keel’ of a bird's bill; the inferior margin of the symphysis of the lower jaw.
| 单词 | θ38732 |
| 释义 | the world > animals > birds > parts of or bird defined by > [noun] > beak or bill > upper or lower beak > part or covering of lower beak (4) gonys1836 The ‘keel’ of a bird's bill; the inferior margin of the symphysis of the lower jaw. interramicorn1866 A separate piece of the horny sheath of the bill situated between the rami of the lower jaw in the albatross, etc. ramicorn1866 Ornithology. A part of the horny sheath of a bird's bill that covers the lower part of the lower mandible (either one on each side, or fused into… gnathotheca1870 the horny covering of the lower beak of a bird. |
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