There are 2 definitions of trisomy in English:

trisomy1

Syllabification: tri·so·my
Pronunciation: /trīˈsōmē, ˈtrīsō-
 
/

noun

Medicine
A condition in which an extra copy of a chromosome is present in the cell nuclei, causing developmental abnormalities.
More example sentences
  • The aneuploid embryos detected in the progeny from this cross include trisomies and UPDs of chromosomes 7 and 18.
  • Both monosomy and trisomy of specific chromosomes are associated with developmental defects and cancer risk.
  • A common type of chromosomal abnormality is called a trisomy.

Origin

1930s: from tri- 'three' + -some3.

Definition of trisomy in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day glee
Pronunciation: gliː
noun
great delight, especially from one's own good fortune…

There are 2 definitions of trisomy in English:

trisomy-212

Syllabification: tri·so·my-21

noun

Medicine
The most common form of Down syndrome, caused by an extra copy of chromosome number 21.
More example sentences
  • Microcephaly can also be caused by the chromosomal disorder, trisomy-21 Down syndrome, and by environmental factors, such as fetal alcohol syndrome and fetal exposure to radiation before 15 weeks gestation.
  • Trisomy 21 can be detected in the first few months of pregnancy by amniocentesis.
  • The majority (about 94%) of children with Down Syndrome are born with standard Trisomy 21, which is not hereditary.

Definition of trisomy in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day glee
Pronunciation: gliː
noun
great delight, especially from one's own good fortune…