- (not in technical use) conjoined twin.
Origin of Siamese twin
First recorded in 1820–30; named after congenitally united twins, Chang and Eng (1811–74), born in Siam, who were joined to each other at the chest
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- non-technical name for conjoined twins
C19: named after a famous pair of conjoined twins, Chang and Eng (1811–74), who were born in Siam
- Either of a pair of conjoined twins. No longer in technical use.