cof·fin bone /ˈkɔfən-/ 名詞
 蹄骨


 Pas·tern n.
 1. The part of the foot of the horse, and allied animals, between the fetlock and the coffin joint. See Illust. of Horse.
 Note: ☞ The upper bone, or phalanx, of the foot is called the great pastern bone; the second, the small pastern bone; and the third, in the hoof, the coffin bone.
 Pastern joint, the joint in the hoof of the horse, and allied animals, between the great and small pastern bones.
 2. A shackle for horses while pasturing.
 3. A patten. [Obs.]

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 Cof·fin n.
 1. The case in which a dead human body is inclosed for burial.
    They embalmed him [Joseph], and he was put in a coffin.   --Gen. 1. 26.
 2. A basket. [Obs.]
 3. A casing or crust, or a mold, of pastry, as for a pie.
    Of the paste a coffin I will rear.   --Shak.
 4. A conical paper bag, used by grocers. [Obs.]
 5. Far. The hollow crust or hoof of a horse's foot, below the coronet, in which is the coffin bone.
 Coffin bone, the foot bone of the horse and allied animals, inclosed within the hoof, and corresponding to the third phalanx of the middle finger, or toe, of most mammals.
 Coffin joint, the joint next above the coffin bone.