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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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More Definitions for 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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