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| | Anatomical Dictionary |
 | | bone formed by the fusion of the of the anklebones astragalus (a) and calcaneum (c). |
 | | Osteoderms include the scutes of crocodiles, the keeled scutes, spines, and tail-club bones of ankylosaurs, and the plates, spines, and gular ossicles of stegosaurs. |
 | | in birds and some dinosaurs, the hind limb bone formed by the fusion of the bottom of the tibia, or calf bone, with the astragalus, the largest ankle bone of dinosaurs and birds. |
| www.dinosauria.com /dml/anatomy.htm (1792 words) |
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