trisomy

noun
tri·​so·​my | \ ˈtrī-ˌsō-mē How to pronounce trisomy (audio) \
plural trisomies

Definition of trisomy

: the condition (as in Down syndrome) of having one or a few chromosomes triploid in an otherwise diploid set

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Other Words from trisomy

trisomic \ (ˌ)trī-​ˈsō-​mik How to pronounce trisomy (audio) \ adjective or noun

Examples of trisomy in a Sentence

Recent Examples on the Web 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 The following week, a blood test came back positive for trisomy 21. Asher Fogle, Good Housekeeping, 11 Feb. 2017

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.

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First Known Use of trisomy

1930, in the meaning defined above

History and Etymology for trisomy

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

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Time Traveler for trisomy

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The first known use of trisomy was in 1930

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Dictionary Entries Near trisomy

trisome

trisomy

trisomy 21

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Cite this Entry

“Trisomy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trisomy. Accessed 5 Aug. 2021.

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More Definitions for trisomy

trisomy

noun
tri·​so·​my | \ ˈtrī-ˌsō-mē How to pronounce trisomy (audio) \
plural trisomies

Medical Definition of trisomy

: 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

Britannica.com: Encyclopedia article about trisomy

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