Down syndrome

Down syndrome  (doun) or Down's syndrome (dounz)

n.

A congenital disorder, caused by the presence of an extra 21st chromosome, in which the affected person has mild to moderate mental retardation, short stature, and a flattened facial profile. Also called trisomy 21.

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[After John Langdon Haydon Down (1828-1896), British physician.]

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Down syndrome (doun) or Down's Syndrome  (dounz)

A congenital disorder caused by the presence of an extra 21st chromosome. People with Down syndrome have mild to moderate mental retardation, short stature, and a flattened facial profile. The syndrome is named after its discoverer, British physician John Langdon Haydon Down (1828-1896).

Thesaurus

Noun

1.

Down syndrome - a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation Down's syndrome, mongolianism, mongolism, trisomy 21 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