Relating to or affecting the outer surface or periphery of cartilage.
From Greek 'ekto-' (outside) and 'chondros' (cartilage), with '-al' suffix, describing the external aspects of cartilaginous structures.
Ectochondral bone formation happens on the outside of cartilage—it's how your skeleton hardens from the outside in, a process so fundamental that breaking the word down literally describes what your body does to grow stronger bones.
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