👉 Antambulacral is a medical term that refers to a specific type of bone in the human body. It is characterized by its shape and size, which can be either convex or concave. Antambulacral bones are also known as "antibone" because they are located between the vertebrae, rather than directly above them. Antambulacral bones include: The ilium (the upper part of the spine), the pubic bone, and the pubis