trisomy

noun

tri·​so·​my ˈtrī-ˌsō-mē How to pronounce trisomy (audio)
plural trisomies
: the condition (as in Down syndrome) of having one or a few chromosomes triploid in an otherwise diploid set
trisomic adjective or noun

Example Sentences

Recent Examples on the Web In trisomy 13, for example, the physical anomalies are so severe that most babies live only for days or weeks. Sarah Zhang, The Atlantic, 20 May 2022 Nineteen long days after the doctor sent the tissue away for testing, the Riveras learned that their unborn child had trisomy 22, a chromosomal disorder that almost never results in a live birth. NBC News, 10 Feb. 2020 Those affected develop an extra chromosome, an occurrence medically known as trisomy, which can cause varied developmental issues. Emy Rodriguez Flores, Redbook, 17 Oct. 2019 Jacob was born with a chromosomal condition called trisomy 9p, which affects his fine motor skills. Matt Szabo, Daily Pilot, 21 Sep. 2019 Most infants born with trisomy 13 die within the first few weeks. Sarah Watts, Glamour, 5 June 2019 But our baby girl had developed with a genetic anomaly known as mosaic trisomy 14. Nadine Jolie Courtney, SELF, 22 Apr. 2019 Hallie was born with trisomy 13, a condition in which a person has an extra chromosome 13. Rose Minutaglio, Good Housekeeping, 16 Dec. 2017 After an ultrasound and a blood test showed positive markers for trisomy 21, her doctor pushed for amniocentesis, which tests amniotic fluid. Asher Fogle, Good Housekeeping, 11 Feb. 2017 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'trisomy.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

Etymology

tri- + -some entry 3 + -y entry 2

First Known Use

1930, in the meaning defined above

Time Traveler
The first known use of trisomy was in 1930

Dictionary Entries Near trisomy

Cite this Entry

“Trisomy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trisomy. Accessed 8 Dec. 2022.

Medical Definition

trisomy

noun
tri·​so·​my ˈtrī-ˌsō-mē How to pronounce trisomy (audio)
plural trisomies
: the condition (as in Down syndrome) of having one or a few chromosomes triploid in an otherwise diploid set

More from Merriam-Webster on trisomy

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