| 单词 | Down syndrome |
| 释义 | Down syndrome Pathol. a genetic disorder, associated with the presence of an extra chromosome 21, characterized by mild to severe mental retardation, weak muscle tone, a low nasal bridge, and epicanthic folds at the eyelids. Also, Down's syndrome. Formerly, mongolism. Also called trisomy 21. [1960-65; after John L. H. Down (1828-96), British physician] |
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