trisomy 21
- noun
- /ˈtraɪsəmi twɛnti ˈwʌn/
- Specialized
:
trisomía 21
- My oldest daughter didn't use one, but my youngest, who was born with an extra 21st chromosome (commonly known as Trisomy 21 or Down Syndrome), used one.
- trisomy 21 (Down syndrome)
Examples
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Research shows that individuals with trisomy 21 have a higher risk of developing certain health conditions as they age.
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While trisomy 16 is the most common in miscarriages, trisomy 21 (Down syndrome) is seen with considerable frequency.
Academic text (2004) -
This is an ultrasound that is done around 11 to 12 weeks that checks for thickening of the neck folds, or the "nuchal fold," which may indicate the presence of Trisomy 21 (Down Syndrome).
Blog text (7) -
The notion that increased APP synthesis can lead to excess Beta/A4 production and that this has a role in the pathogenesis of Alzheimer's disease is supported by the finding that people with trisomy 21 (Down's syndrome), who have a high frequency of Alzheimer's disease, have an extra copy of the APP gene.
Academic text (1992) -
Down syndrome, also known as trisomy 21, is characterized by distinct physical features and varying levels of cognitive impairment.
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Many health professionals recommend early intervention for children diagnosed with trisomy 21 to support their development.
Synonyms
19
3.3
A condition present at birth caused by an extra chromosome that makes learning harder and gives typical physical features
8
3.6
A condition caused by an extra chromosome that makes people have certain facial features, short height and learning difficulties
1
6.1
A change in the number or shape of chromosomes that often causes health problems
1
6.7
A change in the number or shape of chromosomes that often causes health problems
1
5.3
A health condition caused by a change in chromosomes that can affect the body or mind
Surface Forms
Morphology
The term is compositionally built: 'trisomy' denotes an extra chromosome and '21' specifies which chromosome, so the phrase directly means an extra 21st chromosome. Although medical, this naming pattern is literal and cross-linguistically consistent, so a learner who knows both constituents can infer the disorder's basic meaning.
Etymology
Trisomy 21 is named for the simple idea that a person has an 'extra' copy of chromosome number 21. The part tri- means 'three', so the name points to having 'three' copies instead of two and explains why the condition is also called 'Down syndrome'.