Relating to the cuboid bone in the foot and the calcaneus (heel bone).
From cubo- (cuboid bone, from Latin cubus cube-shaped) + calcaneal (relating to heel bone, from Latin calcaneus). Anatomical term for foot structure.
Your foot has a bone literally called 'cuboid' because it's shaped like a cube—ancient anatomists looked at foot bones and said 'yep, that one's a cube' and the name stuck forever!
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