Results in a flat face and short stature and mental retardation

• A congenital disorder caused by having an extra 21st chromosome

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Down syndrome \Down" syn`drome\, Down's syndrome \Down's" syn`drome\, n. (Med.) A congenital disorder caused by an extra chromosome 21 in some or all cells. It causes a variable number and degree of abnormalities, including retarded growth, mental ...

Wiktionary Word definitions in Wiktionary
n. (context now offensive English) Down syndrome

WordNet Word definitions in WordNet
n. a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation [syn: mongolianism , Down's syndrome , Down syndrome , trisomy 21 ]

Wikipedia Word definitions in Wikipedia
Mongolism may refer to: Pan-Mongolism , an irredentist idea advocating the union of the contiguous territories inhabited by Mongols Mongoloid , populations that show certain phenotypic traits Another term for a so-called Mongoloid idiot , an outdated and ...