trisomy 21

1. A congenital disorder caused by having an extra 21st chromosome;
   Results in a flat face and short stature and mental retardation (synset 114183105)
   is a type of:

   • birth defect, congenital abnormality, congenital anomaly, congenital defect, congenital disorder - a defect that is present at birth
   • trisomy - chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell
   same as: down syndrome, down's syndrome, mongolianism, mongolism

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