trisomy

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tri⋅so⋅my

[trahy-soh-mee]

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–noun Pathology.

an abnormality characterized by the presence of an additional chromosome to the normal diploid number.

Origin:
1925–30; tri- + -some ³ + -y ³

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Trisomies
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www.RightHealth.com/Downs_Syndrome

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Health.JustAnswer.com/Trisomy

tri·so·my (trī-sō'mē, trī'sō'-)

n. pl. tri·so·mies
The condition of having three copies of a given chromosome in each somatic cell rather than the normal number of two.

[tri- + -som(e)³ + -y².]
tri'some' n., tri·so'mic adj.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: tri·so·my
Pronunciation: 'trI-"sO-mE
Function: noun
Inflected Form: plural -mies
: the condition (as in Downsyndrome) of having one or a few chromosomes triploid in an otherwise diploid set

Medical Dictionary

trisomy tri·so·my (trī-sō'mē, trī'sō'-)
n.
The condition of having three copies of a given chromosome or chromosome segment in each somatic cell rather than the normal number of two.

tri·so'mic adj.

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