Siamese twin

noun

Definition of Siamese twin

: one of a pair of congenitally united twins

Origin and Etymology of siamese twin

from Chang †1874 and Eng †1874 congenitally united twins born in Siam


Medical Dictionary

Siamese twin

noun Si·a·mese twin \ ˈsī-ə-ˌmēz- , -ˌmēs- \

medical Definition of Siamese twin

: either of a pair of conjoined twins

Learn More about siamese twin


Seen and Heard

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to emit the high shrill tone of bagpipes

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a-closeup-of-a-sunflower
  • Which of the following words means “of or relating to summer”?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!