[Siamese twin] n [fr. Chang d. 1874 and Eng d. 1874 congenitally united twins born in Siam] (1829): one of a pair of congenitally united twins in humans or other vertebrates
SIAMESE TWIN
Meaning of SIAMESE TWIN in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012