Bone, cuboid
Bone, cuboid: The outer bone in the instep of the foot. It is called the cuboid bone because it is shaped like a cube. The cuboid bone is jointed in back with the heel bone (calcaneus) and in front with the bones just behind the fourth and fifth toes (metatarsals).
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- Bone, endochondral
Bone, endochondral: Any bone that develops in and replaces cartilage. The cartilage is partially or entirely destroyed by the process of calcification. The cartilage is then resorbed (reabsorbed), leaving bone in its place. Many bones are formed this way, particularly the long bones of the arms, legs, and ribs. “Endochondral” means “within cartilage.”
- Bone, giant cell tumor of
Bone, giant cell tumor of: A tumor of bone characterized by massive destruction of the end (epiphysis) of a long bone. The site most commonly struck by this tumor is the knee — the far end of the femur and the near end of the tibia. The tumor is often coated by new bony growth. […]
- Bone, heel
Bone, heel: A somewhat rectangular bone at the back of the foot. The words “calcaneus” and “calcium” are related. Medically termed the calcaneus. The calcaneus (from the Latin calcaneum, meaning heel or heel bone) is a bone of the tarsus of the foot which constitutes the heel. In humans, the calcaneus is the largest of […]
- Bone, parietal
Bone, parietal: The main bone on the side of the skull. Although the parietal bone is curved, it is considered a flat bone (as opposed to a tubular bone). The parietal bone is shaped like an irregular quadrangle. It articulates (joins) with the other parietal bone in the midline (top of the head), with the […]
- Bone, sesamoid
Bone, sesamoid: A little bone that is embedded in a joint capsule or tendon; for example, the kneecap (patella).