| paster | The segment forming the part for near vision in two-piece bifocal lenses. (05 Mar 2000) |
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| pastern | The part of the leg of a horse and similar animals that lies between the fetlock joint and the hoof. Origin: O. Fr. Pasturon, pasture; because the shackle of a horse out at pasture is attached to this part of the leg (05 Mar 2000) |