Having two layers or chambers, particularly referring to bone structure with a spongy middle layer between two dense outer layers.
From Greek diplo- (double) and placular (relating to plates or layers). The term evolved in anatomical terminology to describe the distinctive sandwich-like structure of flat bones in vertebrates.
Your skull isn't solid—it's like a bone sandwich! The diploplacular structure found in your skull bones has an outer layer, a spongy middle, and an inner layer, which makes bones both strong and lightweight, allowing you to have a larger brain without a heavier head.
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