Down syndrome
名词 n.
英 /daʊn ˈsɪndɹəʊm/
美 /daʊn ˈsɪndɹoʊm/|/-dɹəm/
英文释义
名词 n.
- A genetic disorder caused by the presence of all or part of a third copy of chromosome 21 (a chromosomal excess), whereby the patients typically have a delay in cognitive ability and physical growth, as well as a small head and tilted eyelids.
词形变化
词源
Named after English physician John Langdon Haydon Down (1828–1896), who first described the condition as a distinct form of mental disability in the 1860s.
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数据来源: Wiktionary