Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • 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 and Etymology 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

  1. Medical Dictionary: Definition of trisomy Britannica.com: Encyclopedia article 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

to criticize in a loud and angry way

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

confounded-person

Which is a synonym of indolent?

melancholy frenetic lazy philistine
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