A rare birth defect where the skull and brain develop abnormally with circular or fused structures.
From cyclo- (Greek kyklos, 'circle') + -cephaly (Greek kephale, 'head'). A medical term combining roots to describe abnormal head/brain development with circular characteristics.
Cyclocephaly is an extremely rare condition that would have been universally fatal in ancient times, but it's given modern embryologists crucial insights into how the brain and skull normally develop and separate from each other.
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