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How to sign: a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation
Similiar / Same: Down syndrome, trisomy 21
Categories: backwardness, birth defect, congenital abnormality, congenital anomaly, congenital defect, congenital disorder, intellectual disability, retardation, slowness, subnormality, trisomy
