Siamese twin


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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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.” Dictionary, Merriam-Webster, Accessed 28 Oct. 2021.

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Siamese twin


English Language Learners Definition of Siamese twin

Siamese twin

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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