Keel - Ryukottokki

Japanese: 竜骨突起 - リュウコツトッキ
Keel - Ryukottokki
The protrusion that protrudes from the center of the underside of the sternum of birds, like the keel of a ship. The pectoral muscles that move the wings are attached to it.

Source: About Shogakukan Digital Daijisen Information | Legend

Japanese:
鳥類の胸骨の下面中央に、船の竜骨のように突き出ている突起。翼を動かす胸筋が付着する。胸峰。

出典 小学館デジタル大辞泉について 情報 | 凡例

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