trisomy 21

noun

The presence of three copies of the 21st chromosome in the karyotype.

Meanings

nountrisomy 21 (uncountable)
  1. uncountablemedical geneticsThe presence of three copies of the 21st chromosome in the karyotype.

    Synonyms: Down syndrome

Synonyms & antonyms

nounThe presence of three copies of the 21st chromosome in the karyotype.

More synonyms by meaning

nouna congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation

Broader
trisomybirth defectcongenital anomalycongenital defect

Synonym sets from Open English WordNet, CC BY 4.0.

Translations

Chinese Mandarin 21三体综合症, 21三體綜合症 /21三体综合症
  • 21三体综合症 (èrshíyīsāntǐzōnghézhèng)syndrome
  • 21三體綜合症 /21三体综合症 (èrshíyīsāntǐzōnghézhèng)syndrome
French trisomie 21
  • trisomie 21syndrome
German Trisomie 21
  • Trisomie 21syndrome
Polish trisomia 21
  • trisomia 21syndrome
Portuguese trissomia 21, trissomia do 21
  • trissomia 21syndrome
  • trissomia do 21syndrome
Russian трисомия 21
  • трисомия 21 (trisomija 21)syndrome
Cite this entry
APA

trisomy 21. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/trisomy%2021

MLA

“trisomy 21.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/trisomy%2021. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “trisomy 21,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/trisomy%2021.

Source: trisomy 21 on Wiktionary, CC BY-SA 4.0.