trisomy 21
noun
tri·so·my 21 ˈtrī-ˌsō-mē-ˌtwen-tē-ˈwən 
: down syndrome
Example Sentences
Recent Examples on the Web These laws typically target Down syndrome, or trisomy 21, in which the presence of a third chromosome 21 can have a range of physical and mental effects, milder in some children than others. 
Sarah Zhang, The Atlantic, 20 May 2022 There are three types of Down syndrome: translocation, mosaicism and trisomy 21. Cnn Editorial Research, CNN, 28 May 2021 For example, having three copies of chromosome 21 (trisomy 21) is of clear clinical interest, because that leads to Down syndrome. Quanta Magazine, 8 Sep. 2021 In those with trisomy 21, the individual possesses a full extra copy of the chromosome. Cnn Editorial Research, CNN, 28 May 2021 The aim of the series, Grevenitis told me, is to demystify disability by compiling a full portrait of life with trisomy 21. Eren Orbey, The New Yorker, 18 Aug. 2020 Doctors commonly screen for Down syndrome (trisomy 21), Edwards syndrome (trisomy 18) and Patau syndrome (trisomy 13) during this test. Emily Mullin, New York Times, 17 Apr. 2020 The following week, the results came back positive for trisomy 21, the most common type of Down Syndrome. Kate Branch, Vogue, 9 Feb. 2018 See More
Sarah Zhang, The Atlantic, 20 May 2022 There are three types of Down syndrome: translocation, mosaicism and trisomy 21. Cnn Editorial Research, CNN, 28 May 2021 For example, having three copies of chromosome 21 (trisomy 21) is of clear clinical interest, because that leads to Down syndrome. Quanta Magazine, 8 Sep. 2021 In those with trisomy 21, the individual possesses a full extra copy of the chromosome. Cnn Editorial Research, CNN, 28 May 2021 The aim of the series, Grevenitis told me, is to demystify disability by compiling a full portrait of life with trisomy 21. Eren Orbey, The New Yorker, 18 Aug. 2020 Doctors commonly screen for Down syndrome (trisomy 21), Edwards syndrome (trisomy 18) and Patau syndrome (trisomy 13) during this test. Emily Mullin, New York Times, 17 Apr. 2020 The following week, the results came back positive for trisomy 21, the most common type of Down Syndrome. Kate Branch, Vogue, 9 Feb. 2018 See More Word History
Etymology
from the occurrence of trisomy in chromosome 21 of persons with Down syndrome
First Known Use
1961, in the meaning defined above
Medical Definition
trisomy 21
noun
-ˌtwent-ē-ˈwən
: down syndrome