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 tri·so·mies

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

tri·so·mic 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 tri·so·mies

  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

February 9, 2016

marked by high spirits and laughter

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

spindrift duvet pince-nez kittly-benders
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ