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

trisomy 21

play
noun tri·so·my 21 \ˈtrī-ˌsō-mē-ˌtwen-tē-ˈwən\

Definition of trisomy 21



Origin of trisomy 21

from the occurrence of trisomy in chromosome 21 of persons with Down syndrome


First Known Use: 1961


Medical Dictionary

trisomy 21

play
noun tri·so·my 21 \-ˌtwent-ē-ˈwən\

Medical Definition of trisomy 21




Learn More about trisomy 21


Seen and Heard

What made you want to look up trisomy 21? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to eat gluttonously or ravenously

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?

flashy tetchy superficial gregarious
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