trisomy
noun
tri·so·my
ˈtrī-ˌsō-mē 
plural trisomies
: the condition (as in Down syndrome) of having one or a few chromosomes triploid in an otherwise diploid set
Examples of trisomy in a Sentence
Recent Examples on the Web
Around 12 weeks into the pregnancy, doctors told Downs' sister, Tatum Green of Atlanta, the baby had a severe genetic condition called Edwards Syndrome or trisomy 18.
—
Brad Schmitt, The Tennessean, 2 July 2025
That’s partly because, unlike a condition with a clear genetic marker like Down Syndrome or trisomy 18, ASD encompasses a wide range of conditions that share some characteristics.
—Laura Tillman, Hartford Courant, 16 June 2025
At a 14-week ultrasound, doctors saw an indicator of a genetic trisomy.
—Wendy Grossman Kantor, People.com, 10 June 2025
Mark your calendar March is health awareness month for bleeding disorders, multiple sclerosis, colorectal cancer, endometriosis, trisomy, traumatic brain injury and kidneys (March 1-15 for the one on the left and March 16-31 for the one on the right).
—Scott Lafee, San Diego Union-Tribune, 4 Mar. 2025
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Brad Schmitt, The Tennessean, 2 July 2025
That’s partly because, unlike a condition with a clear genetic marker like Down Syndrome or trisomy 18, ASD encompasses a wide range of conditions that share some characteristics.
—Laura Tillman, Hartford Courant, 16 June 2025
At a 14-week ultrasound, doctors saw an indicator of a genetic trisomy.
—Wendy Grossman Kantor, People.com, 10 June 2025
Mark your calendar March is health awareness month for bleeding disorders, multiple sclerosis, colorectal cancer, endometriosis, trisomy, traumatic brain injury and kidneys (March 1-15 for the one on the left and March 16-31 for the one on the right).
—Scott Lafee, San Diego Union-Tribune, 4 Mar. 2025
See All Example Sentences for trisomy
Cite this Entry
“Trisomy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trisomy. Accessed 22 Jul. 2025.
Copy CitationMedical Definition
trisomy
noun
tri·so·my
ˈtrī-ˌsō-mē
plural trisomies
: the condition (as in Down syndrome) of having one or a few chromosomes triploid in an otherwise diploid set
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