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 trisomic (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, "Many miscarriages are still a mystery. A new test could give women faster answers.," 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, "Beautiful Photos That Celebrate Kids and Adults With Down Syndrome," 17 Oct. 2019 Jacob was born with a chromosomal condition called trisomy 9p, which affects his fine motor skills. Matt Szabo, Daily Pilot, "High School Male Athlete of the Week: Joey Palmblade is the wall for Costa Mesa water polo," 21 Sep. 2019 Most infants born with trisomy 13 die within the first few weeks. Sarah Watts, Glamour, "Your Ob-Gyn Might Not Perform Your Abortion—Here's Why," 5 June 2019 But our baby girl had developed with a genetic anomaly known as mosaic trisomy 14. Nadine Jolie Courtney, SELF, "Everything I Thought I Knew About Miscarriages Changed When I Had Two ‘Silent’ Ones," 22 Apr. 2019 Hallie was born with trisomy 13, a condition in which a person has an extra chromosome 13. Rose Minutaglio, Good Housekeeping, "Inside the School That Teaches You How to Be Santa," 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, "Where Have All the Kids with Down Syndrome Gone?," 11 Feb. 2017 The following week, a blood test came back positive for trisomy 21. Asher Fogle, Good Housekeeping, "Where Have All the Kids with Down Syndrome Gone?," 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

Time Traveler

The first known use of trisomy was in 1930

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Statistics for trisomy

Cite this Entry

“Trisomy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trisomy. Accessed 10 Aug. 2020.

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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

Comments on trisomy

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