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Down's syndrome
noun
- pathol a condition caused by the presence of an extra copy of chromosome 21 resulting in learning difficulties and physical differences, such as shorter stature Former namemongolism Technical nametrisomy 21
- ( as modifier )
a Down's syndrome baby
Down's syndrome
- A congenital condition, caused by an abnormality in the chromosomes , marked by moderate to severe mental retardation and changes in certain physical features.
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Usage
Although the condition was once generally known as mongolism , this term has been considered offensive since the early 1960s. The terms Down's syndrome or ( US ) Down syndrom are now preferred.
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Word History and Origins
Origin of Down's syndrome1
C19: after John Langdon-Down (1828–96), English physician
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