Siamese twin

noun

Definition of Siamese twin

: one of a pair of congenitally united twins

First Known Use of Siamese twin

1829, in the meaning defined above

History and Etymology for Siamese twin

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

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Time Traveler for Siamese twin

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The first known use of Siamese twin was in 1829

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Dictionary Entries Near Siamese twin

Siamese fighting fish

Siamese twin

Siam, Gulf of

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Cite this Entry

“Siamese twin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Siamese%20twin. Accessed 28 Oct. 2021.

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More Definitions for Siamese twin

Siamese twin

noun

English Language Learners Definition of Siamese twin

Siamese twin

noun
Si·​a·​mese twin | \ ˈsī-ə-ˌmēz- How to pronounce Siamese twin (audio) , -ˌmēs- How to pronounce Siamese twin (audio) \

Medical Definition of Siamese twin

: either of a pair of conjoined twins

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