shackle joint

(anatomy) A joint formed by a bony ring passing through a hole in a bone, as at the bases of spines in some fishes.

Japanese Meaning

魚類など一部の動物に見られる、骨輪が骨の孔を通過することで形成される関節。

解剖の際、魚類学者は各背棘の基部に骨の輪が穴を通って形成された関節を発見した。

Sense（1）

(anatomy) A joint formed by a bony ring passing through a hole in a bone, as at the bases of spines in some fishes.

shackle joints

（ plural ）