Down syndrome

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Down syndrome

  • /daʊn ˈsɪndɹəʊm/ UK
  • /daʊn ˈsɪndɹoʊm/ US
  • /-dɹəm/ US

Where it comes from

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.

noun Down’s syndrome

  1. Australia, Canada, Ireland, New Zealand, US, uncountable 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.

    Similar: Down's, mongolism, Mongolian idiocy, trisomy 21

Translations

Every language

noun genetic disorder caused by a chromosomal excess

Españolsíndrome de Down
한국어다운 증후군 daun jeunghugun
日本語ダウン症 Daun-shō
中文唐氏綜合症 /唐氏综合症 Tángshì zōnghézhèng, 唐氏症 Tángshìzhèng, 先天性愚型 xiāntiānxìng yúxíng, 蒙古症 Ménggǔzhèng
हिन्दीडाउन सिंड्रोम ḍāun siṇḍrom
Portuguêssíndrome de Down
Françaissyndrome de Down, trisomie 21
DeutschDownsyndrom, Down-Syndrom, Trisomie 21, Mongolismus
Italianosindrome di Down
Ελληνικάσύνδρομο Down sýndromo Down
Русскийсиндром Дауна sindrom Dauna
Tiếng Việthội chứng Down
العربيةمُتَلَازِمَة دَاوْن
עבריתתסמונת דאון \ תִּסְמֹנֶת דָּאוּן tismónet daun

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MLA

"Down syndrome." Wiktionary, via Micwyn, micwyn.com/word/down%20syndrome. Accessed 6 Nov. 2026.

APA

Down syndrome. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/down%20syndrome

Chicago

"Down syndrome." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/down%20syndrome.

BibTeX
@misc{down_syndrome_2026,
  title = {Down syndrome},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/down%20syndrome},
  urldate = {2026-11-06}
}