Down syndrome
Syllables: Down syn·dromeUK/daʊn ˈsɪndɹəʊm/US/daʊn ˈsɪndɹoʊm/
Down syndrome noun: 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.

Noun
Down syndrome (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.
- Synonyms:
- Down's, mongolism, Mongolian idiocy, trisomy 21
Down syndrome meaning in Hindi, Tamil, Telugu and Arabic
Down syndrome in Hindi
- genetic disorder caused by a chromosomal excess
- डाउन सिंड्रोम ḍāun siṇḍrom
Down syndrome in Tamil
- டவுன் நோய்க்குறி, டவுன் நோய்த்தொகை, வழக்கத்திற்கு மாறாக
Down syndrome in Telugu
- genetic disorder caused by a chromosomal excess
- డౌన్ సిండ్రోము ḍaun siṇḍrōmu
Down syndrome in Arabic
- genetic disorder caused by a chromosomal excess
- مُتَلَازِمَة دَاوْن
More languagesFewer languages
- Down syndrome in Malay
- sindrom Down
- Down syndrome in Indonesian
- sindrom Down
- Down syndrome in Persian
- سندرم داون
- Down syndrome in Vietnamese
- hội chứng Down
Synonyms of Down syndrome
Forms of Down syndrome
| alternative form | Down’s syndrome |
|---|
Origin of Down syndrome
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.
Words formed from Down syndrome
Questions about Down syndrome
- What does Down syndrome mean?
- Down syndrome means 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.
- What is Down syndrome in Hindi?
- Down syndrome in Hindi is डाउन सिंड्रोम (ḍāun siṇḍrom). See Down syndrome meaning in Hindi.
- What part of speech is Down syndrome?
- Down syndrome is a noun.
- How do you pronounce Down syndrome?
- Down syndrome is pronounced /daʊn ˈsɪndɹəʊm/ (UK).
Words near Down syndrome in the dictionary
Source and license
Adapted from Wiktionary: Down syndrome (page history and authors); down syndrome (Tamil Wiktionary) (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
Last updated:
Pronunciation audio from Wikimedia Commons, each file under its own free license: en-au-Down syndrome.ogg.
Cite this entry: “Down syndrome.” Word.ws, https://word.ws/down_syndrome. Based on Wiktionary, CC BY-SA 4.0.
