Siamese twin

noun

Definition of Siamese twin

  1. :  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

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

Medical Definition of Siamese twin

  1. :  either of a pair of conjoined twins


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