最終更新日：2024/07/30

(ornithology) A small projection of three or four feathers on the first digit of the wing on some birds.

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alula

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元となった辞書の項目

alula

noun

(ornithology) A small projection of three or four feathers on the first digit of the wing on some birds.

The alula is a small feathered appendage found on the first digit of a bird's wing.

意味（1）

(ornithology) A small projection of three or four feathers on the first digit of the wing on some birds.

On the wing, even the tiny “thumb feather” or alula can be seen.