Down's syndrome

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a congenital disorder caused by having an extra 21st chromosome;
results in a flat face and short stature and mental retardation
• Syn:
mongolism, mongolianism, Down syndrome, trisomy 21
• Hypernyms:
trisomy, birth defect, congenital anomaly, congenital defect, congenital disorder, congenital abnormality