Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

trisomy

play
noun tri·so·my \ˈtrī-ˌsō-mē\

Definition of trisomy

plural trisomies

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

trisomic play \(ˌ)trī-ˈsō-mik\ adjective or noun


Origin of trisomy

tri- + 3-some + 2-y


First Known Use: 1930


Medical Dictionary

trisomy

play
noun tri·so·my \ˈtrī-ˌsō-mē\

Medical Definition of trisomy

plural trisomies

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




Learn More about trisomy


Seen and Heard

What made you want to look up trisomy? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a division or portion of a pool or whole

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1926873504

Which of the following best describes an easily irritated person?

superficial flashy gregarious tetchy
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ